Added a test for fragments with multiple nodes.
Added a test for fragments with multiple nodes.

google/gumbo-parser,abc00/gumbo-parser,mcanthony/gumbo-parser,kevinhendricks/gumbo-parser,kevinhendricks/gumbo-parser,kevinhendricks/gumbo-parser,luoxn28/gumbo-parser,google/gumbo-parser,aleksandaratanasov/gumbo-parser,luoxn28/gumbo-parser,lvchao0428/gumbo-parser,google/gumbo-parser,aleksandaratanasov/gumbo-parser,luoxn28/gumbo-parser,mcanthony/gumbo-parser,aleksandaratanasov/gumbo-parser,lvchao0428/gumbo-parser,f123h456/gumbo-parser,mcanthony/gumbo-parser,abc00/gumbo-parser,f123h456/gumbo-parser,mcanthony/gumbo-parser,lvchao0428/gumbo-parser,f123h456/gumbo-parser,abc00/gumbo-parser,abc00/gumbo-parser,google/gumbo-parser,f123h456/gumbo-parser,aleksandaratanasov/gumbo-parser,f123h456/gumbo-parser,lvchao0428/gumbo-parser,luoxn28/gumbo-parser,aleksandaratanasov/gumbo-parser,lvchao0428/gumbo-parser,kevinhendricks/gumbo-parser,google/gumbo-parser,kevinhendricks/gumbo-parser,luoxn28/gumbo-parser,abc00/gumbo-parser,mcanthony/gumbo-parser