String3 = testLex "string with tab"
  "\"\t\""
  [ GoTokStr (Just "\"\t\"") "\t"
  , GoTokSemicolon]

te
testString3 = testLex "string with tab"
  "\"\t\""
  [ GoTokStr (Just "\"\t\"") "\t"
  , GoTokSemicolon]
testString3 = testLex "string with tab"
  "\"\t\""
  [ GoTokStr (Just "\"\t\"") "\t"
  , GoTokSemicolon]