Fix duplicate quotes in CQP lexer

Change-Id: Id034ef76de2dbc80da7ea3b9674453e86d3225e9
Reviewed-on: https://korap.ids-mannheim.de/gerrit/c/KorAP/Koral/+/9106
Reviewed-by: Marc Kupietz <kupietz@ids-mannheim.de>
diff --git a/src/main/antlr/cqp/CQP.g4 b/src/main/antlr/cqp/CQP.g4
index 1507abb..55e1a0e 100644
--- a/src/main/antlr/cqp/CQP.g4
+++ b/src/main/antlr/cqp/CQP.g4
@@ -78,7 +78,7 @@
 BACKSLASH	: '\\';
 SQUOTE      : '\'';
 //in PQ+, DQUOTE was not defined
-DQUOTE: ('"'|'„'|'“'|'“'|'”');
+DQUOTE: ('"'|'„'|'“'|'”');
 
 
 /* Regular expressions and Regex queries */