[gtksourceview] rst.lang: Be more strict for directives

[Christian Hergert <chergert src gnome org>]

commit 3d0ae179d2d816e12bbbfe5961bfef21851c9938
Author: Pierre Ossman <ossman cendio se>
Date:   Fri Oct 15 17:02:36 2021 +0200

    rst.lang: Be more strict for directives
    
    They generally don't match whitespace characters.

 data/language-specs/rst.lang | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/data/language-specs/rst.lang b/data/language-specs/rst.lang
index 6a57449a..6aeeb4a0 100644
--- a/data/language-specs/rst.lang
+++ b/data/language-specs/rst.lang
@@ -43,11 +43,15 @@
   <definitions>
 
     <context id="directive" class="no-spell-check" style-ref="directive">
-      <match>^\s*\.\. .*::.*$</match>
+      <match>^\s*\.\. \w*::.*$</match>
     </context>
 
     <context id="footnotes" style-ref="directive">
-      <match>^\s*\.\. \[.+\] .*$</match>
+      <match>^\s*\.\. \[([0-9]+|\#|\#\w+|\*)\] </match>
+    </context>
+
+    <context id="citation" style-ref="directive">
+      <match>^\s*\.\. \[\w+\] </match>
     </context>
 
     <context id="link-target" class="no-spell-check" style-ref="directive">
@@ -163,6 +167,7 @@
         <context ref="directive"/>
         <context ref="link-target"/>
         <context ref="footnotes"/>
+        <context ref="citation"/>
         <context ref="comment"/>
         <context ref="comment-single"/>
         <context ref="title-adornment"/>