perf annotate: Show group event string for stdio

When we enable the group, for tui/stdio2, the output first line includes
the group event string. While for stdio, it will show only one event.

For example,

perf record -e cycles,branches ./div
perf annotate --group --stdio

    Percent |      Source code & Disassembly of div for cycles (44407 samples)
    ......

The first line doesn't include the event 'branches'.

With this patch, it will show the correct group even string.

perf annotate --group --stdio

    Percent |      Source code & Disassembly of div for cycles, branches (44407 samples)
    ......

Signed-off-by: Jin Yao <[email protected]>
Suggested-by: Arnaldo Carvalho de Melo <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions