GraphPlanar: Fix the highlighter.

Comment used to be ignored. They are now in the Hidden channel.

CHANGELOG

@@ -5,5 +5,8 @@
 - See CVE-2023-31194. Do not add twice an edge in the graph. This caused Boost
                       algorithms to misbehave.
 
+## Bug fix
+- Fix highlighter for the GraphPlanar translator.
+
 ## Build
 - Set MSVC_RUNTIME_LIBRARY to /MT for static builds

src/translator/graph_planar/GraphPlanar.g4

@@ -1,5 +1,10 @@
 grammar GraphPlanar;
 
+// Ignored TOKENS
+WS: [ \t]+ -> channel(HIDDEN);
+COMMENT: '/*' .*? '*/' -> channel(HIDDEN);
+LINE_COMMENT: '//' .*? ('\r'? '\n' | EOF) -> channel(HIDDEN);
+
 graph: EOL* edges (EOL+ edges)* EOL* EOF;
 edges: node (arrow node)+;
 arrow: RIGHT_ARROW | NONE_ARROW | LEFT_RIGHT_ARROW | LEFT_ARROW;
@@ -16,9 +21,4 @@ fragment LETTER: ~[ \t\n\r\-<>"];
 
 EOL: '\r\n' | '\n';
 
-// Ignored TOKENS
-WS: [ \t] -> skip;
-COMMENT: '/*' .*? '*/' -> skip;
-LINE_COMMENT: '//' .*? '\r'? '\n' -> skip;
-
 // vim: filetype=antlr