* bzrlib/strace.py: (strace): is now a wrapper that calls strace_detailed. (strace_detailed): like strace before but with an option to disable following forked children without polluting the kwargs param.
* bzrlib/tests/test_strace.py: (TestStrace.test_strace_callable_is_called, TestStrace.test_strace_callable_result, TestStrace.test_strace_result_has_raw_log): use strace_detailed while disabling following forked children, the syntax is a bit uglier but non-test users should never use anyway..