Added another default recognizer location to gitignore.

Author: lmasroca

.gitignore

@@ -13,6 +13,10 @@
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
 
+# IntelliJ ANTLR plugin recognizer default locations:
+core/gen/
+core/src/main/antlr4/org/evomaster/core/parser/gen
+
 **/*.DS_Store
 /.idea/
 .idea/
@@ -33,8 +37,6 @@ client-java/instrumentation-shared/target/
 client-java/database-spy/target/
 client-java/ci-utils/target
 core/target/
-# IntelliJ ANTLR plugin recognizer default location:
-core/gen/
 /core-tests/e2e-tests/dropwizard-examples/target/
 /core-tests/e2e-tests/e2e-tests-utils/target/
 /core-tests/e2e-tests/spring/spring-rest-openapi-v2/target/

core/src/main/antlr4/org/evomaster/core/parser/RegexJavaParser.g4

@@ -167,7 +167,7 @@ classAtomNoDash
  | BaseChar
  | DecimalDigit
  | COMMA | CARET | DOLLAR | DOT | STAR | PLUS | QUESTION
- | PAREN_open | PAREN_close | BRACKET_open | BRACE_open | BRACE_close | OR | E | Q
+ | PAREN_open | PAREN_close | BRACKET_open | BRACE_open | BRACE_close | OR
  | COLON
  // should be interpreted literally:
  // As they are lexer tokens, these character sequences are captured as such. In particular these require some extra