Update runtime files.
diff --git a/runtime/syntax/javascript.vim b/runtime/syntax/javascript.vim
index 9589b19..a95ecac 100644
--- a/runtime/syntax/javascript.vim
+++ b/runtime/syntax/javascript.vim
@@ -9,6 +9,7 @@
" (ss) additional factoring of keywords, globals, and members
" Last Change: 2012 Oct 05
" 2013 Jun 12: adjusted javaScriptRegexpString (Kevin Locke)
+" 2018 Apr 14: adjusted javaScriptRegexpString (LongJohnCoder)
" tuning parameters:
" unlet javaScript_fold
@@ -37,7 +38,7 @@
syn match javaScriptSpecialCharacter "'\\.'"
syn match javaScriptNumber "-\=\<\d\+L\=\>\|0[xX][0-9a-fA-F]\+\>"
-syn region javaScriptRegexpString start=+/[^/*]+me=e-1 skip=+\\\\\|\\/+ end=+/[gim]\{0,2\}\s*$+ end=+/[gim]\{0,2\}\s*[;.,)\]}]+me=e-1 contains=@htmlPreproc oneline
+syn region javaScriptRegexpString start=+/[^/*]+me=e-1 skip=+\\\\\|\\/+ end=+/[gimuys]\{0,2\}\s*$+ end=+/[gimuys]\{0,2\}\s*[;.,)\]}]+me=e-1 contains=@htmlPreproc oneline
syn keyword javaScriptConditional if else switch
syn keyword javaScriptRepeat while for do in