[gtksourceview] More strict start of heredoc in Ruby

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 3faeb5f62341134626b41af27553249fa0fec769
Author: Jesse van den Kieboom <jesse vandenkieboom epfl ch>
Date:   Mon Mar 12 10:15:12 2012 +0100

    More strict start of heredoc in Ruby
    
    Fixes: #671862

 data/language-specs/ruby.lang |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/data/language-specs/ruby.lang b/data/language-specs/ruby.lang
index c27adc3..5b985a6 100644
--- a/data/language-specs/ruby.lang
+++ b/data/language-specs/ruby.lang
@@ -466,7 +466,7 @@
     </context>
 
     <context id="here-doc-string" style-ref="here-doc" style-inside="true">
-      <start>&lt;&lt;(\w+)</start>
+      <start>&lt;&lt;([a-zA-Z_]\w*)</start>
       <end>^\%{1 start}</end>
       <include>
         <context ref="escape"/>
@@ -477,7 +477,7 @@
     </context>
 
     <context id="here-doc-indented-string" style-ref="here-doc" style-inside="true">
-      <start>&lt;&lt;-(\w+)</start>
+      <start>&lt;&lt;-([a-zA-Z_]\w*)</start>
       <end>^\s*\%{1 start}</end>
       <include>
         <context ref="escape"/>