Documentation: coccinelle: Escape --options to fix Sphinx output

Without such escaping, -- is rendered as – (en dash).

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Acked-by: Julia Lawall <Julia.Lawall@inria.fr>
Link: https://lore.kernel.org/r/20230129151408.1525324-1-j.neuschaefer@gmx.net
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/dev-tools/coccinelle.rst

@@ -219,7 +219,7 @@ instance::
     cat cocci.err
 
 You can use SPFLAGS to add debugging flags; for instance you may want to
-add both --profile --show-trying to SPFLAGS when debugging. For example
+add both ``--profile --show-trying`` to SPFLAGS when debugging. For example
 you may want to use::
 
     rm -f err.log
@@ -248,7 +248,7 @@ variables for .cocciconfig is as follows:
 
 - Your current user's home directory is processed first
 - Your directory from which spatch is called is processed next
-- The directory provided with the --dir option is processed last, if used
+- The directory provided with the ``--dir`` option is processed last, if used
 
 Since coccicheck runs through make, it naturally runs from the kernel
 proper dir; as such the second rule above would be implied for picking up a
@@ -265,8 +265,8 @@ The kernel coccicheck script has::
     fi
 
 KBUILD_EXTMOD is set when an explicit target with M= is used. For both cases
-the spatch --dir argument is used, as such third rule applies when whether M=
-is used or not, and when M= is used the target directory can have its own
+the spatch ``--dir`` argument is used, as such third rule applies when whether
+M= is used or not, and when M= is used the target directory can have its own
 .cocciconfig file. When M= is not passed as an argument to coccicheck the
 target directory is the same as the directory from where spatch was called.