Update runtime files
diff --git a/runtime/syntax/groovy.vim b/runtime/syntax/groovy.vim
index 2245b79..9bc1bd6 100644
--- a/runtime/syntax/groovy.vim
+++ b/runtime/syntax/groovy.vim
@@ -1,10 +1,10 @@
" Vim syntax file
" Language: Groovy
-" Original Author: Alessio Pace <billy.corgan@tiscali.it>
-" Maintainer: Tobias Rapp <yahuxo@gmx.de>
-" Version: 0.1.16
+" Original Author: Alessio Pace <billy.corgan AT tiscali.it>
+" Maintainer: Tobias Rapp <yahuxo+vim AT mailbox.org>
+" Version: 0.1.17
" URL: http://www.vim.org/scripts/script.php?script_id=945
-" Last Change: 2016 May 23
+" Last Change: 2020 May 26
" THE ORIGINAL AUTHOR'S NOTES:
"
@@ -253,7 +253,7 @@
endif
" syn region groovyELExpr start=+${+ end=+}+ keepend contained
syn match groovyELExpr /\${.\{-}}/ contained
-syn match groovyELExpr /\$[a-zA-Z_][a-zA-Z0-9_.]*/ contained
+syn match groovyELExpr /\$[a-zA-Z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u00FF\u0100-\uFFFE_][a-zA-Z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u00FF\u0100-\uFFFE0-9_.]*/ contained
hi def link groovyELExpr Identifier
" TODO: better matching. I am waiting to understand how it really works in groovy