Documentation / .gitignoreon commit difftool --no-index: error out on --dir-diff (and don't crash) (f3a3a02)
   1*.xml
   2*.html
   3*.[1-8]
   4*.made
   5*.texi
   6*.pdf
   7git.info
   8gitman.info
   9howto-index.txt
  10doc.dep
  11cmds-*.txt
  12mergetools-*.txt
  13manpage-base-url.xsl
  14SubmittingPatches.txt
  15tmp-doc-diff/