Update runtime files.
diff --git a/runtime/syntax/man.vim b/runtime/syntax/man.vim
index 56f6d10..4e08cd7 100644
--- a/runtime/syntax/man.vim
+++ b/runtime/syntax/man.vim
@@ -4,7 +4,7 @@
" Previous Maintainer: SungHyun Nam <goweol@gmail.com>
" Previous Maintainer: Gautam H. Mudunuri <gmudunur@informatica.com>
" Version Info:
-" Last Change: 2020 Apr 30
+" Last Change: 2020 Sep 19
" Additional highlighting by Johannes Tanzler <johannes.tanzler@aon.at>:
" * manSubHeading
@@ -21,8 +21,8 @@
syn case ignore
syn match manReference "\f\+([1-9][a-z]\=)"
-syn match manSectionHeading "^[a-z][a-z -]*[a-z]$"
-syn match manSubHeading "^\s\{3\}[a-z][a-z -]*[a-z]$"
+syn match manSectionHeading "^\a.*$"
+syn match manSubHeading "^\s\{3\}\a.*$"
syn match manOptionDesc "^\s*[+-][a-z0-9]\S*"
syn match manLongOptionDesc "^\s*--[a-z0-9-]\S*"
" syn match manHistory "^[a-z].*last change.*$"