[gtksourceview] lua.lang: improve escape regex

[Sébastien Wilmet <swilmet src gnome org>]

commit f46f3ada13ede524da56586d57f6648120acd6aa
Author: Kate Adams <self kateadams eu>
Date:   Tue Oct 21 22:53:17 2014 +0100

    lua.lang: improve escape regex
    
    List of valid escape strings taken from
    http://www.lua.org/work/doc/manual.html (3.1 - Lexical Conventions).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=738971

 data/language-specs/lua.lang |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/language-specs/lua.lang b/data/language-specs/lua.lang
index 5fd4e47..89d24ec 100644
--- a/data/language-specs/lua.lang
+++ b/data/language-specs/lua.lang
@@ -44,7 +44,7 @@
 
   <definitions>
     <context id="lua-escape" style-ref="escape">
-      <match>\\(\d\d?\d?|.)</match>
+      <match>\\(\d{1,3}|a|b|f|n|r|t|u{[0-9a-fA-F]+?}|v|x[0-9a-fA-F]{2}|z|\\|"|'|\[|\])</match>
     </context>
 
     <context id="label" style-ref="label">