Merge branch 'nd/trace-with-env'

The tracing machinery learned to report tweaking of environment variables as well. * nd/trace-with-env: run-command.c: print new cwd in trace_run_command() run-command.c: print env vars in trace_run_command() run-command.c: print program 'git' when tracing git_cmd mode run-command.c: introduce trace_run_command() trace.c: move strbuf_release() out of print_trace_line() trace: avoid unnecessary quoting sq_quote_argv: drop maxlen parameter