manuals: fix quoting of double dashes

Otherwise rendered as "en" dashes by sphinx, for example:
git pull –rebase
instead of
git pull --rebase

Readers could confuse them with normal dashes.

Exception: replace by \-\- in italic text (*text*)
as Sphinx cannot nest italic and quoted text.

For consistency, also update quoting in strings in the same code hunks.

(From yocto-docs rev: 4e7ce372e37f76148f623a5295a15e08bc2603ff)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/profile-manual/usage.rst

@@ -171,7 +171,7 @@ understand what's going on in a way that we can act on in a useful way.
 
 To dive down into a next level of detail, we can use 'perf record'/'perf
 report' which will collect profiling data and present it to use using an
-interactive text-based UI (or simply as text if we specify --stdio to
+interactive text-based UI (or simply as text if we specify ``--stdio`` to
 'perf report').
 
 As our first attempt at profiling this workload, we'll simply run 'perf