Re: [PATCH] perf script python: fix unintended underline

"Paul A. Clarke" [off-list ref] writes:

On Fri, Aug 06, 2021 at 01:45:01PM -0700, Stephen Brennan wrote:

quoted

The text ranging from "subsystem__event_name" to
"raw_syscalls__sys_enter()" is interpreted by asciidoc as a pair of
unconstrained text formatting markers. The result is that the manual
page displayed this text as underlined, and the HTML pages displayed
this text as italicized. Escape the first double-underscore to prevent
this.

I think it would be better to escape the second double-underscore as well,
to prevent the same problem recurring with future changes.

quoted

diff --git a/tools/perf/Documentation/perf-script-python.txt b/tools/perf/Documentation/perf-script-python.txt
index 5e43cfa5ea1e..0250dc61cf98 100644
--- a/tools/perf/Documentation/perf-script-python.txt
+++ b/tools/perf/Documentation/perf-script-python.txt

@@ -167,7 +167,7 @@ below).

 Following those are the 'event handler' functions generated one for
 every event in the 'perf record' output.  The handler functions take
-the form subsystem__event_name, and contain named parameters, one for
+the form subsystem\__event_name, and contain named parameters, one for
 each field in the event; in this case, there's only one event,
 raw_syscalls__sys_enter().  (see the EVENT HANDLERS section below for

escape this    ^ , too.

I've tried escaping a few combinations of these four underscores.

  \__ __    - escaping the first but not the second (as this patch)
              produces correct output
  \_\_ \_\_ - escaping all underscores results in no underlines, but the
              manual page shows "raw_syscalls\_\_sys_enter()" in its
              output.
  \_\_ __   - escaping the first two results in no underlines, but the
              manual page shows "subsystem\_\_event_name"
  \__ \__   - escaping the first of each double-underscore results in no
              underlines, but the manual page shows
              "raw_syscalls\__sys_enter()"

It seems that asciidoc only allows the first in a potential pair to be
escaped? I'll be the first to admit, I know nothing about asciidoc, so I
may have missed something here.

Stephen

quoted

 more info on event handlers).
-- 

PC