1mandoc: warn.in:10:8: WARNING: parenthesis in function name: sin()
2mandoc: warn.in:14:19: WARNING: comma in function argument: double y, double x
3mandoc: warn.in:16:10: WARNING: parenthesis in function name: close)
4mandoc: warn.in:22:5: WARNING: parenthesis in function name: (open
5mandoc: warn.in:24:5: WARNING: parenthesis in function name: (*popen
6mandoc: warn.in:26:5: WARNING: parenthesis in function name: (trail)x
7