trace: avoid unnecessary quoting

Trace output which contains arbitrary strings (e.g., the
arguments to commands which we are running) is always passed
through sq_quote_buf(). That function always adds
single-quotes, even if the output consists of vanilla
characters. This can make the output a bit hard to read.

Let's avoid the quoting if there are no characters which a
shell would interpret. Trace output doesn't necessarily need
to be shell-compatible, but:

  - the shell language is a good ballpark for what humans
    consider readable (well, humans versed in command line
    tools)

  - the run_command bits can be cut-and-pasted to a shell,
    and we'll keep that property

  - it covers any cases which would make the output
    visually ambiguous (e.g., embedded whitespace or quotes)

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/trace.c b/trace.c
index fa9174f..9784915 100644
--- a/trace.c
+++ b/trace.c
@@ -157,7 +157,7 @@ static void trace_argv_vprintf_fl(const char *file, int line,
 
 	strbuf_vaddf(&buf, format, ap);
 
-	sq_quote_argv(&buf, argv);
+	sq_quote_argv_pretty(&buf, argv);
 	print_trace_line(&trace_default_key, &buf);
 }
 
@@ -426,6 +426,6 @@ void trace_command_performance(const char **argv)
 		atexit(print_command_performance_atexit);
 
 	strbuf_reset(&command_line);
-	sq_quote_argv(&command_line, argv);
+	sq_quote_argv_pretty(&command_line, argv);
 	command_start_time = getnanotime();
 }