Update runtime files
diff --git a/runtime/syntax/jargon.vim b/runtime/syntax/jargon.vim
index 05f45a2..c4b017d 100644
--- a/runtime/syntax/jargon.vim
+++ b/runtime/syntax/jargon.vim
@@ -1,23 +1,24 @@
" Vim syntax file
" Language: Jargon File
" Maintainer: Dan Church (https://github.com/h3xx)
-" Last Change: 2019 Sep 27
+" Last Change: 2020 Mar 16
"
" quit when a syntax file was already loaded
if exists("b:current_syntax")
finish
endif
-syn match jargonChaptTitle /:[^:]*:/
-syn match jargonEmailAddr /[^<@ ^I]*@[^ ^I>]*/
-syn match jargonUrl +\(http\|ftp\)://[^\t )"]*+
-syn region jargonMark start="{" end="}"
+syn region jargonHeader start="^:" end="$" contains=jargonChaptTitle
+syn match jargonChaptTitle /:[^:]*:/ contained
+syn match jargonEmailAddr /[+._A-Za-z0-9-]\+@[+._A-Za-z0-9-]\+/
+syn match jargonUrl +\(https\?\|ftp\)://[^\t )"]*+
+syn region jargonMark start="{[^\t {}]" end="}"
" Define the default highlighting.
" Only when an item doesn't have highlighting yet
-hi def link jargonChaptTitle Title
-hi def link jargonEmailAddr Comment
-hi def link jargonUrl Comment
-hi def link jargonMark Label
+hi def link jargonChaptTitle Title
+hi def link jargonEmailAddr Comment
+hi def link jargonUrl Comment
+hi def link jargonMark Label
let b:current_syntax = "jargon"