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patch 9.1.1615: diff format erroneously detected

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Problem:  diff format erroneously detected
          (Tomáš Janoušek)
Solution: Make the regex to detect normal diff format a bit stricter,
          while at it, fix wrong test content from patch v9.1.1606

fixes: #17946

Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Christian Brabandt
2025-08-10 00:01:21 +02:00
parent f56f490ca2
commit 887b4981e7
3 changed files with 19 additions and 5 deletions
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5
runtime/autoload/dist/script.vim vendored
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@ -4,7 +4,7 @@ vim9script
# Invoked from "scripts.vim" in 'runtimepath'
#
# Maintainer: The Vim Project <https://github.com/vim/vim>
# Last Change: 2025 Aug 08
# Last Change: 2025 Aug 09
# Former Maintainer: Bram Moolenaar <Bram@vim.org>
export def DetectFiletype()
@ -287,6 +287,7 @@ def DetectFromText(line1: string)
# Diff file:
# - "diff" in first line (context diff)
# - "Only in " in first line
# - "34,35c34,35" normal diff format output
# - "--- " in first line and "+++ " in second line (unified diff).
# - "*** " in first line and "--- " in second line (context diff).
# - "# It was generated by makepatch " in the second line (makepatch diff).
@ -295,7 +296,7 @@ def DetectFromText(line1: string)
# - "=== ", "--- ", "+++ " (bzr diff, common case)
# - "=== (removed|added|renamed|modified)" (bzr diff, alternative)
# - "# HG changeset patch" in first line (Mercurial export format)
elseif line1 =~ '^\(diff\>\|Only in \|\d\+\(,\d\+\)\=[cda]\d\+\>\|# It was generated by makepatch \|Index:\s\+\f\+\r\=$\|===== \f\+ \d\+\.\d\+ vs edited\|==== //\f\+#\d\+\|# HG changeset patch\)'
elseif line1 =~ '^\(diff\>\|Only in \|\d\+\(,\d\+\)\=[cda]\d\+\(,\d\+\)\=\>$\|# It was generated by makepatch \|Index:\s\+\f\+\r\=$\|===== \f\+ \d\+\.\d\+ vs edited\|==== //\f\+#\d\+\|# HG changeset patch\)'
|| (line1 =~ '^--- ' && line2 =~ '^+++ ')
|| (line1 =~ '^\* looking for ' && line2 =~ '^\* comparing to ')
|| (line1 =~ '^\*\*\* ' && line2 =~ '^--- ')