trace2: trim whitespace in region messages in perf target format

Avoid unecessary trailing whitespace in "region_enter" and "region_leave"
messages in perf target format.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/trace2/tr2_tgt_perf.c b/trace2/tr2_tgt_perf.c
index 4a9d99218bf1be3f87fed728bd2301a7c2002575..fb845cb62774deb8b4a6324435c550c1846eb4cc 100644 (file)
--- a/trace2/tr2_tgt_perf.c
+++ b/trace2/tr2_tgt_perf.c
@@ -452,8 +452,11 @@ static void fn_region_enter_printf_va_fl(const char *file, int line,
        struct strbuf buf_payload = STRBUF_INIT;
 
        if (label)
-               strbuf_addf(&buf_payload, "label:%s ", label);
-       maybe_append_string_va(&buf_payload, fmt, ap);
+               strbuf_addf(&buf_payload, "label:%s", label);
+       if (fmt && *fmt) {
+               strbuf_addch(&buf_payload, ' ');
+               maybe_append_string_va(&buf_payload, fmt, ap);
+       }
 
        perf_io_write_fl(file, line, event_name, repo, &us_elapsed_absolute,
                         NULL, category, &buf_payload);
@@ -469,8 +472,11 @@ static void fn_region_leave_printf_va_fl(
        struct strbuf buf_payload = STRBUF_INIT;
 
        if (label)
-               strbuf_addf(&buf_payload, "label:%s ", label);
-       maybe_append_string_va(&buf_payload, fmt, ap);
+               strbuf_addf(&buf_payload, "label:%s", label);
+       if (fmt && *fmt) {
+               strbuf_addch(&buf_payload, ' ' );
+               maybe_append_string_va(&buf_payload, fmt, ap);
+       }
 
        perf_io_write_fl(file, line, event_name, repo, &us_elapsed_absolute,
                         &us_elapsed_region, category, &buf_payload);