strsignal_spec() coverage

specification CString *strsignal_spec( CallContext context, IntT sig )

coverages branches failures hits/fails
strsignal_coverage ( known signal )   31
( unknown signal ) failure 177: Requirement failed: {strsignal.08} either a pointer to the string "unknown signal", or a null pointer
1/1
100% (2/2)   32/1