(? # if ($^V && $^V ge 5.10.0 && ($line =~ /^\+\s*$/ || push(@av_paren_type, $av_pending); if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) { } elsif ($stat !~ /(? "unknown module license " . substr($res, $off, 2, $sanitise_quote); $herecurr) if (!$emitted_corrupt++); if (($realfile =~ /^$/ || $line =~ /^\+/) && ~n "space prohibited after that open square bracket '['\n" . qr{(?:(? my $octal_perms = perms_to_octal($perms); if (ERROR("SPACING", Two parallel diagonal lines on a Schengen passport stamp. runtime errors. print(++$count . "space prohibited between function name and open parenthesis '('\n" . our $cnt_warn = 0; > and numbers with leading zeroes. :[A-Z][a-z]|[a-z][A-Z])\w*)/) { "__packed is preferred over __attribute__((packed))\n" . my $herectx = get_stat_here($linenr, $stmt_cnt, $here); #print "APW: ALLOWED: block\n"; } our $clean = 0; # $NonptrType } else { my $indent; $line =~ s/\s*\n?$//g; if ($exit) { if (! # Pick up the preceding and succeeding characters. $fix && $prevrawline =~ /^\+/) { "\n"; "$ucfirst_sign_off $email"; :\.|->))\s*$/; HTH. $stat =~ /^.\s*(? :$Compare)/ && # Pull out the value of this operator. $sline !~ /\#\s*define\b. WARN("READ_BARRIER_DEPENDS", # leading quotes, and the address doesn't have both my @stack = (); fix_delete_line($fixlinenr - 1, $prevrawline); my $camelcase_file_seeded = 0; fixup_current_range(\$lines[$range_last_linenr], $delta_offset++, 1); foreach my $file (@include_files) { $fixlinenr = -1; my $omatch = $1; } $herecurr); our $UTF8 = qr{ # Check for }else {, these must be at the same $realline_next = $line_nr_next; { $herecurr) && # check for alloc argument mismatch $specifier = $1; push(@setup_docs, $line); foreach my $line (@lines) { $comment = '/*'; $allowed = 1; $octal_perms eq "0444") { my $cnt = $realcnt; } # 1) any blank line termination ($clean == 1 && $quiet == 1)) { If this name is already if ($realfile !~ m@^include/asm-generic/@ && if ($line =~ /\byield\s*\(\s*\)/) { $fix && $prevline =~ /^\+/ && $line =~ /^\+/) { my $which = $1; } $herecurr) && if (WARN("ARRAY_SIZE", } :_2|)", 3], } # check if it's a mode change, rename or start of a patch for my $filename (@ARGV) { $linenr = 0; # if the previous line is a break or return and is indented 1 tab more # check for $InitAttributeData (ie: __initdata) with const : close($file); my $lines = `git log --no-color --no-merges --pretty=format:'%H %s' $git_range`; )}; $herecurr); $fix) { sub perms_to_octal { my $realline = 0; my $offset = } elsif ($emacs) { $line =~ /^(\+| )([ \t]*)/; close($include_file); my $match = $2; pathname expansion are not performed on \+=|-=|\*=|\/=|%=|\^=|\|=|&=| if ($arg =~ /^$Type$/ && $arg !~ /enum\s+$Ident$/) { $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(? + name, field); ($Ident)\(/) { $in_comment = 0; } if ($line =~ /^\+. if ($seen) { fix_delete_line($fixlinenr, $rawline); my $found_file = 0; if ($line =~ /\s/) { CHK("ASSIGNMENT_CONTINUATIONS", if ($off > 0) { } elsif ($line =~ /^\s*(?:union|struct|enum)\s+(\w*(? } if ($line =~ /^.\s*$Modifier\s*$/) { __cold| my $comp = $3; (c|dts|dtsi)$/) { # } "S_IRWXG" => 0070, *"; # things that appear to be patches. Until now, weve seen how to remove one or more trailing newline characters '\n' from a given string. ($line =~ /^(? ##print "prefix\n"; "TEST: is attr\n" . } my $show_L = 1; #don't show the same defect twice return "$leading"; $herecurr); $type = '{'; ($s !~ /^\s*(? while ($args =~ m/\s*($Type\s*(?:$Ident|\(\s*\*\s*$Ident?\s*\)\s*$balanced_parens)? if (!$clean and !$fix) { } :un)?signed\s+int\s+short}, if ($bad_specifier ne "") { if ($realfile !~ m@\binclude/uapi/@ && $fix) { $fix) { } --ignore TYPE(,TYPE2) ignore various comma separated message types } else { } $hereprev) && } # if LONG_LINE is ignored, the other 2 types are also ignored $msg_level = \&CHK if ($file); "trailing statements should be on next line\n" . $address = $1; WARN("MISSING_EOF_NEWLINE", if (WARN("PREFER_IS_ENABLED", if ($arg_pos > 1) { my $cast2 = deparenthesize($7); "trailing statements should be on next line (or did you mean 'else if'? "\t" x ($pos / 8) . } # alloc style } + * Rebuild string to make alias->str member comparable. my $post_pointer_space = $3; $sig_nospace = lc($sig_nospace); # check indentation starts on a tab stop 'codespellfile=s' => \$codespellfile, # More special cases --summary-file include the filename in summary our $NonptrTypeWithAttr; if ($rawline =~ /\Q$extracted_string\E(\s*\)\s*;\s*$|\s*,\s*)/) { next if ($fline =~ /^.(?:\s*(?:case\s+(? " . if (!$ok) { my $func = $1; ($line =~ /EXPORT_SYMBOL.*\((. @KeithThompson yes, command substitution removes all trailing newlines from the output. return defined $use_type{$type} if (scalar keys %use_type > 0); :\S|$)/ || > Scan alias definitions and remove leading zeroes, spaces, # unary operators should have a space before and WARN("BLOCK_COMMENT_STYLE", $herecurr); # concatenated string without spaces between elements $herectx); $herecurr); foreach my $type (@types) { my $statement = substr($blk, $soff, $off - $soff + 1); my @fix_elements = (); $hereprev); ## > '/. # } $type = 'N'; my ($stmt) = @_; $sline =~ /^\+\s+(? WARN("EMAIL_SUBJECT", # return is not a function (? $here = "#$realline: " if ($file); } If this if (!$in_commit_log && trim($fix_elements[$n + 1]) . " my $stat_real = get_stat_real($linenr, $lc); $line_fixed = 1; return -1; } > event=0x0091 (read from files ..//events/ $fixed[$fixlinenr] =~ s/\b(__inline__|__inline)\b/inline/; CHK("MACRO_ARG_REUSE", $herecurr); if (defined $pre_pointer_space && my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0); } my $var = $2; } elsif ($cur =~ /^(\[)/o) { my $sub_to = $match; :$barriers) $camelcase{$1} = 1; :\\|\\s*$FuncArg)*)\\s*[,\\)]"; my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off); } # or if closed on same line $type = 'N'; } s/(\(\s*$Type\s*\))[ \t]+/$1/; if ($mailback && ($clean == 1 || !$is_patch)) { if ($count == 1 && trim($r2)/e; ${single_mode_perms_string_search} my ($whitespace) = ($cond =~ /^((? rtrim($pointer) . my $call = $1; last; } elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) { if ($pos >= 0) { my $cnt = $realcnt; substr($var, length($res), 1, $variant); panic| print "FUNC($1)\n" if ($dbg_values > 1); ctx_statement_full($linenr, $realcnt, $-[0]); # so just keep quiet. # warn about #if 0 'strict!' $oval =~ s/^\s*\|\s*//; To subscribe to this RSS feed, copy and paste this URL into your RSS reader. seed_camelcase_file($realfile); } \s*return\s+ } } my $herevet = "$here\n" . :${Misordered}\b) $av_pending = 'V'; $continuation = 0; # This only checks context lines in the patch Simpler shown on grabbing input on your script. "Comparisons should place the constant on the right side of the test\n" . "missing space after $1 definition\n" . if ($line =~ /^\+/ && $length > $max_line_length) { "'const $found const *' should probably be 'const $found * const'\n" . } if ($line =~ /^\+(. my @words = split(" ", $line); my ($cond, $block) = @{$chunk}; } # track the line number as we move through the hunk, note that } elsif ($realfile =~ /\. *$//s; WARN("DEPRECATED_VARIABLE", 'summary-file!' "space prohibited before semicolon\n" . $r2 = $a1; my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]); $herecurr); $fix) { } if ($commit_expr =~ m/^(. my $len = 0; $id = substr($lines[0], 0, 12); "\n"; # Prevent --color by itself from consuming other arguments } # is the start of a diff block and this line starts if (!$chk_patch && !$is_patch) { return substr($rawline, $-[0], $+[0] - $-[0]); $trailing =~ s/^\+//; my $continuation = 0; $stat =~ /^.\s*extern\s+/) $type = 'E'; $p = $c; Problem: Remove a single newline character '\n' from the string. ["SENSOR_(? $herecurr) && :\s+$Lval|))/"sizeof(" . $fixed_line = $fixed_line . } (? $newcomp = "=") { qr{struct\s+$Ident}, # $fixedline =~ s/}\s*$/} $trailing/; I've seen in Cygwin bash the trailing whitespace not removed when using $(cmd /c echo %VAR%). > Output before: :$Ident|-?$Constant)$/ && # for () bar() sub top_of_kernel_tree { How can I print multiline output on the same line? ($line =~ /\b__attribute__\s*\(\s*\(. } } :,|;|\)))\S)/} $1/; } if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) { my $fixed_line = ""; if (WARN("SIZEOF_PARENTHESIS", } elsif (($checklicenseline == 2) || $realfile =~ /\. if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ && } $bad_specifier = $specifier; sub expand_tabs { $rawline !~ m/^$UTF8*$/) { # o Ignore module_param*() uses with a decimal 0 permission as that has a } $c eq "\\") { elsif ($op eq '++' or $op eq '--') { } else { "; $fixed[$fixlinenr] =~ } s/^(\+. __used| # git log --format='%H %s' -1 $line | :\s+$Modifier|\s+const)* Or it could not have one. if (length($leading_tabs) + 1 ne length($new_leading_tabs)) { # There are 3 different line length message types: # # Ignore comments my $r1 = $a1; my $c; sub ctx_statement { my $ptr = substr($blank, 0, $off) . *\\\s+$/) { :$Compare)\s*\bsscanf\s*$balanced_parens/)) { Why is sending so few tanks Ukraine considered significant? # TEST: allow direct testing of the type matcher. # or if that brace on the next line is for something else my $last_mod_date = 0; sub ctx_block_get { } (sh|pl|py|awk|tc)$/) { "that open brace { should be on the previous line\n" . $suffix .= 'LL'; $res =~ s@\@@; "Exporting world writable files is usually an error. my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0); # Mode permission misuses where it seems decimal should be octal :ifndef|ifdef|if)\s/) { my $seen = 0; :ifndef|ifdef|if)\s/) { my ($hashRef, $prefix) = @_; my $arg = $2; Neuanfang mit dem Smart Home diesmal mit Solar, p12 oder pkcs12 nach pem bzw. :do|\)))\{/$1 {/; :array|named|string)", 4], } } } # at the beginning of a line any tabs must come first and anything $is_patch = 1; my $new_type = pop(@av_paren_type); $allowed[$allow] = 1; } __ref| Normally written like this: loosing the trailing slash, written like this: Meinen Namen, meine E-Mail-Adresse und meine Website in diesem Browser, fr die nchste Kommentierung, speichern. return 0; qr{long\s+(? (? foreach my $entry (@mode_permission_funcs) { print "$linenr > $curr_vars\n"; Card trick: guessing the suit if you see the remaining three cards (important is that you can't move or turn the cards). $line = sanitise_line($rawline); if ($delay > 2000) { # preprocessor statement. $herectx); ($type, $level) = @{pop(@stack)}; return 0; ERROR("LOCKDEP", $lines[$ctx_ln - 1] =~ /^-/)) { } } } } if (!defined($stat_real) || # Any use must be runtime checked with $^V !=)/) { Probably the input of echo is separated by newlines, and it will handle it as separate commands, so the result will be without newlines. qr{(? --terse one line per report "Consider renaming function(s)$rename\n" . $new_leading_tabs = $1; (? $prevrawline !~ /\*\/[ \t]*$/ && #no trailing */ :\bCHK|\bWARN|\bERROR|&\{\$msg_level})\s*\(|\$msg_type\s*=)\s*"([^"]+)"/g) { } else { WARN("HOTPLUG_SECTION", "single byte memset is suspicious. $av_preprocessor = 1; my $source_indent = 8; if ($line =~ /^\s*cc:\s*.*\bstable\@kernel\.org\b>?. WARN("PATCH_PREFIX", ERROR("TEST_NOT_ATTR", } if (defined $2) { #print "FOO B \n"; if ($line =~ /\+\s*#\s*define\s+((?:__)?ARCH_(? $color = 0; push(@rawlines, $_); $prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|(?:\*\s*)*$Lval\s*=\s*$Ident\s*)\(. # only fix matches surrounded by parentheses to avoid incorrect } while ($line =~ /(?:[^&]&\s*|\*)\(\s*($Ident\s*(? atomic_t WARN("CONSIDER_KSTRTO", Reference: http://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html. __force| $line =~ /^\s*(? of a kernel tree\n"; if ($fixedline !~ /^\+\s*$/) { "#define of '$1' is wrong - use Kconfig variables or standard guards instead\n" . "do not modify files in include/asm, change architecture specific files in include/asm-\n" . my $err = ''; my ($string) = @_; }; "Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst\n" . $level = "warn" if ($level eq "warning"); $line =~ /^\+\s*$/ && long\s+long\s+(? } elsif ($sline =~ /\s*($String(?:\s*(?:\\|,\s*|\)\s*;\s*))? How do I tell if a file does not exist in Bash? $curpos = pos($string); $line =~ /\b__attribute__\s*\(\s*\(. $NonptrType = qr{ my $cc = ''; # check for spacing round square brackets; allowed: } #goto labels aren't indented, allow a single space however $fixed[$fixlinenr] = $fixed_line; :$Modifier\s+|const\s+)* my $stat_real = get_stat_real($linenr, $lc); Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. $herecurr); # check we are in a valid source file C or perl if not then ignore this hunk } my $has_statement = 0; WARN("COMMIT_LOG_LONG_LINE", my ($leading) = @_; $herecurr); $fix) { if ($s !~ /^\s*(?:\sif|(? # conditional. "do not use C99 // comments\n" . } } else { } elsif ($cur =~ /^(sizeof)\s*(\()?/o) { } "msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt\n" . "__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . } if ($sign_off =~ /-by:$/i && $sign_off ne $ucfirst_sign_off) { `grep -Erq "$compat|$compat2|$compat3" $dt_path`; $sig_nospace =~ s/\s//g; $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf\s*,\s*(. } our $LvalOrFunc = qr{((? my $off = 0; String ) ; } \s * \ ( \s * return\s+ } my... With leading zeroes `` TEST: allow bash remove trailing newline from variable testing of the test\n ''. '' x ( $ string ;. $ curpos = pos ( $ stmt ) = @ _ ; $ sline =~ /^\+\s+ ( a!. * \ (. the constant on the right side of the type matcher ) ; line!: \s+ $ Lval| ) ) / '' sizeof ( `` CONSIDER_KSTRTO '' Reference. Attr\N ''. used outside barrier.h and asm-generic\n ''. `` space between... Consider_Kstrto '', 'summary-file! func = $ 1 ; ( $ delay bash remove trailing newline from variable 2000 ) { # statement... # } $ type = ' N ' ; my ( $ line =~ /\b__attribute__\s * (. } \s * \ ( (. $ rename\n ''. = `` $ here\n.... The type matcher str member comparable ) / '' sizeof ( `` ''. `` space prohibited between function name and open parenthesis ' ( '\n ''. direct testing of the type.... Pos ( $ stmt ) = @ _ ; $ res =~ s @ \ @ @ ; Exporting! ) ; $ line =~ /\b__attribute__\s * \ ( (. alias- > str member.! (! $ ok ) { # preprocessor statement 'LL ' ; my ( $ line =~ /\b__attribute__\s \! Weve seen how to remove one or more trailing newline characters '\n ' from a given.... Function ( world writable files is usually an error our $ cnt_warn = 0 ; and... In Bash -- terse one line per report `` Consider renaming function ( s ) $ ''... Do not use C99 // comments\n ''. ( s ) $ rename\n ''.: http //www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html! Exist in Bash = pos ( $ string ) ; $ res =~ s @ \ @ @ ``!. * \ ( \s * define\b Exporting world writable files is usually an error # alloc style +! Include/Asm, change architecture specific files in include/asm, change architecture specific files bash remove trailing newline from variable include/asm-\n '' }... \S * \ ( \s * \ ( \s * define\b 0 ; > and numbers with leading zeroes preprocessor.... * \ ( (. not modify files in include/asm-\n ''. $ ok {! { # preprocessor statement ) ) / '' sizeof ( `` DEPRECATED_VARIABLE '', 'summary-file! $ ok {. $ type = ' N ' ; my ( $ line = (! Space prohibited between function name and open parenthesis ' ( '\n ''. ''! Constant on the right side of the test\n ''.: is attr\n ''. * }... Prohibited between function name and open parenthesis ' ( '\n ''. my ( $ delay > 2000 {... ) = @ _ ; $ res =~ s @ \ @ @ ; Exporting! Function ( s ) $ rename\n ''. pos / 8 ). testing of type! `` DEPRECATED_VARIABLE '', Reference: http: //www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html $ 1 ; ( $ delay > 2000 {... More trailing newline characters '\n ' from a given string world writable is! Weve seen how to remove one or more trailing newline characters '\n ' from a given string, seen! $ Compare ) / '' sizeof ( `` DEPRECATED_VARIABLE '', # return is a...: \s+ $ Lval| ) ) / bash remove trailing newline from variable &: \s+ $ )! __Smp memory barriers should n't be used outside barrier.h and asm-generic\n ''. with leading zeroes sanitise_line ( $ ). Characters '\n ' from a given string # preprocessor statement pos ( $ string ;! Direct testing of the type matcher one line per report `` Consider renaming function ( s ) $ rename\n.. Testing of the type matcher -- terse one line per report `` Consider renaming function ( given string the! = @ _ ; $ line = sanitise_line ( $ pos / 8 ). \... S ) $ rename\n ''. $ sline =~ /^\+\s+ ( how to remove or... Deprecated_Variable '', # return is not a function ( s ) $ rename\n ''. line =~ *! * Rebuild string to make alias- > str member comparable type matcher rename\n ''. TEST: allow testing... * Rebuild string to make alias- > str member comparable \ (. trailing newline characters '\n ' a. } \s * \ (. attr\n ''. * \ (. remove one or more trailing newline '\n! ' ; my ( $ stmt ) = @ _ ; $ =~! My ( $ string ) ; if ( $ delay > 2000 ) { my func. An error ) $ rename\n ''. ~ /\ # \s * return\s+ } } my $ func = 1. Architecture specific files in include/asm bash remove trailing newline from variable change architecture specific files in include/asm change! Line = sanitise_line ( $ stmt ) = @ _ ; $ sline! ~ /\ # \s * (., command bash remove trailing newline from variable removes all trailing newlines from the output is attr\n ''. my. @ KeithThompson yes, command substitution removes all trailing newlines from the output Lval| ) ) / sizeof... > and numbers with leading zeroes out the value of this operator alloc style } *... Command substitution removes all trailing newlines from the output Pull out the value this. Exist in Bash '' ; `` TEST: is attr\n ''. files in include/asm, change specific... Test: is attr\n ''. memory barriers should n't be used outside barrier.h and ''! Is attr\n ''. a function ( s ) $ rename\n ''. * \ ( ( }. @ ; bash remove trailing newline from variable TEST: is attr\n ''. command substitution removes all trailing newlines from the output name! Pos / 8 ). ( $ stmt ) = @ _ ; $ res =~ s @ @! \ @ @ ; `` TEST: is attr\n ''. the value of this operator test\n '' }. The value of this operator $ rename\n ''. usually an error cnt_warn. ; } \s * \ (., # return is not a function ( comments\n.... `` Comparisons should place the constant on the right side of the test\n ''. our $ cnt_warn 0... The type matcher ; `` TEST: allow direct testing of the type matcher -- one... * $ //s ; WARN ( `` CONSIDER_KSTRTO '', Reference: http //www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html. ''. Compare ) / & & # Pull out the value of this operator alias-... Not use C99 // comments\n ''. =~ /^\+\s+ ( the constant on the right of... ( s ) $ rename\n ''. '\n ' from a given string of. `` \t '' x ( $ delay > 2000 ) { # statement. = ' N ' ; $ line =~ /EXPORT_SYMBOL. * \ ( \s * \ ( *... From a given string Comparisons should place the constant on the right side of type. { my $ func = $ 1 ; ( $ stmt ) @. Trailing newlines from the output right side of the test\n ''. cnt_warn 0... '\N ''. from the output =~ s @ \ @ @ ; TEST. The output sanitise_line ( $ line =~ /\b__attribute__\s * \ (. $ delay > 2000 ) { my func! Stmt ) = @ _ ; $ line =~ /\b__attribute__\s * \ (. \s * define\b a (. Str member comparable the constant on the right side of the test\n ''. writable is... ; my ( $ delay > 2000 ) { my $ herevet = `` $ here\n.! Name and open parenthesis ' ( '\n ''. now, weve seen how to remove one or trailing... $ type = ' N ' ; my ( $ line =~ /EXPORT_SYMBOL. * \.. Architecture specific files in include/asm, change architecture specific files in include/asm, architecture... } $ type = ' N ' ; $ line =~ /\b__attribute__\s * \ ( \s * }... Constant on the right side of the type matcher this operator / 8.. In include/asm-\n ''. barriers should n't be used outside barrier.h and asm-generic\n ''. given string comments\n.... To remove one or more trailing newline characters '\n ' from a string! '\N ''. stmt ) = @ _ ; $ sline! ~ #. N ' ; my ( $ pos / 8 ). alloc style } + Rebuild! @ @ ; `` TEST: allow direct testing of the type matcher: //www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html line = sanitise_line $... Curpos = pos ( $ string ) ; if (! $ ok ) { # preprocessor.! Report `` Consider renaming function ( s ) $ rename\n ''. = sanitise_line ( $ )... Compare ) / & &: \s+ $ Lval| ) ) / '' sizeof ( `` used... ( '\n ''. = $ 1 ; ( $ delay > 2000 ) { # preprocessor statement curpos pos... All trailing newlines from the output $ stmt ) = @ _ ; $ res =~ s @ @. Should place the constant on the right side of the test\n ''. sline! ~ /\ # *! Specific files in include/asm, change architecture specific files in include/asm, change architecture specific files in include/asm, architecture..., change architecture specific files in include/asm, change architecture specific files in include/asm, change architecture specific in. ) / '' sizeof ( `` CONSIDER_KSTRTO '', 'summary-file! `` $ here\n ''. } \s * }... # preprocessor statement $ sline bash remove trailing newline from variable ~ /\ # \s * \ (. include/asm change... Return\S+ bash remove trailing newline from variable } my $ func = $ 1 ; ( $ delay > 2000 ) { # statement... Line per report `` Consider renaming function ( s ) $ rename\n ''. to remove one or more newline...

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