Java/ANTLR does not lex escape sequences in String

[andreasabel]

The lexer generated for String by the Java/ANTLR backend does not translate escape sequences, e.g. \n is not translated to a newline character but it remains backslash followed by n.

ATTN: @gapag

[andreasabel]

Looks like getStringFromGrammarStringLiteral does not do the job.

• CharSupport.getStringFromGrammarStringLiteral() doesn't handle escaped double quotes anymore antlr/antlr4#2290