Hi Bram and dev,
"_" was used for the argument name for the first time in doc/textprop.txt. It
is not highlighted at present. It is necessary to change
runtime/syntax/help.vim.
Is it OK with the attached patch?
--
Best regards,
Hirohito Higashi (h_east)
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diff --git a/runtime/syntax/help.vim b/runtime/syntax/help.vim
index 693a11373..8803db590 100644
--- a/runtime/syntax/help.vim
+++ b/runtime/syntax/help.vim
@@ -66,7 +66,7 @@ syn match helpSpecial "\[N]"
syn match helpSpecial "N N"he=s+1
syn match helpSpecial "Nth"me=e-2
syn match helpSpecial "N-1"me=e-2
-syn match helpSpecial "{[-a-zA-Z0-9'"*+/:%#=[\]<>.,]\+}"
+syn match helpSpecial "{[-a-zA-Z0-9_'"*+/:%#=[\]<>.,]\+}"
syn match helpSpecial "\s\[[-a-z^A-Z0-9_]\{2,}]"ms=s+1
syn match helpSpecial "<[-a-zA-Z0-9_]\+>"
syn match helpSpecial "<[SCM]-.>"
