Fixed declaration list grammar and added a test
Fixed declaration list grammar and added a test

felipensp/clever,felipensp/clever,felipensp/clever,clever-lang/clever,felipensp/clever,clever-lang/clever,clever-lang/clever,clever-lang/clever,clever-lang/clever,felipensp/clever,clever-lang/clever,clever-lang/clever,felipensp/clever,felipensp/clever