Fix error while building edocs

INFO:  Regenerating edocs for triq
./src/triq_dom.erl, function largeint/0: at line 638: unknown error parsing specification: {638,edoc_parser,
                                      ["syntax error before: ","'.'"]}.
edoc: skipping source file './src/triq_dom.erl': {'EXIT',error}.

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>