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runtime: update vimCommand syntax pattern (#6976)

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Update a flawed match pattern for the vimCommand syntax group. To see
the effect of this fix, open a vimscript buffer,

  nvim -u NONE foo.vim

configure a couple highlight groups,

  :hi! vimIsCommand ctermfg=Green
  :hi! vimCommand ctermfg=Red
  :syntax enable

and add the following lines to the buffer:

  let foo=xFoo
  let bar=zBar

You'll notice the "z" in zBar is Red, while xFoo and the rest of Bar are green. This will
be the case as long as the word following `=` starts with the letter "z". This has already
been fixed upstream by adding a "\>" word boundary to the match pattern:

  https://github.com/vim/vim/issues/124
  e271909625 (diff-86da060e2153c8ce5dc317a7b4b5a29dR27)

This particular match pattern was also mentioned in issue #5491, but in reference to a bug
that was related to the generated part of syntax/vim.vim, whereas this bug lives in the
non-generated part of the file.
This commit is contained in:
Ivan 2017-07-08 06:44:36 -04:00 committed by Justin M. Keyes
parent 226603a8d8
commit 17298a7912
1 changed files with 1 additions and 1 deletions
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2
runtime/syntax/vim.vim
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@ -21,7 +21,7 @@ syn keyword vimTodo contained COMBAK FIXME TODO XXX
syn cluster vimCommentGroup contains=vimTodo,@Spell
" Special and plugin vim commands {{{2
syn match vimCommand contained "\<z[-+^.=]\="
syn match vimCommand contained "\<z[-+^.=]\=\>"
syn keyword vimOnlyCommand contained fix[del] op[en] sh[ell] P[rint]
syn keyword vimStdPlugin contained DiffOrig Man N[ext] S TOhtml XMLent XMLns