util: improve fd_cstr test coverage #148
Description
The following functions in //src/util/cstr:test_cstr.c are not covered by unit tests yet:
- fd_cstr_casecmp
- fd_cstr_to_ulong_octal
- fd_cstr_append_printf
- fd_cstr_append_cstr
- fd_cstr_append_cstr_safe
- fd_cstr_hash
- fd_cstr_hash_append