Use inline literal markup for options in releasenotes

This commit makes the releasenotes to use 'inline literal markup[0]
because it would be accurate rendering for commandline
options. Otherwise, dashes are changed into an en/em dash entity. And
this commit also fixes some inline literal markups which I
noticed. Ideally, we should fix like that things in one
patch. However, it's a bit hard to find them all..

[0] http://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html#roles

Change-Id: I8f7691b3ff40ccde051620f44217dab244d76960
diff --git a/releasenotes/notes/add-load-list-cmd-35a4a2e6ea0a36fd.yaml b/releasenotes/notes/add-load-list-cmd-35a4a2e6ea0a36fd.yaml
index 403bbad..145e7dd 100644
--- a/releasenotes/notes/add-load-list-cmd-35a4a2e6ea0a36fd.yaml
+++ b/releasenotes/notes/add-load-list-cmd-35a4a2e6ea0a36fd.yaml
@@ -1,7 +1,7 @@
 ---
 features:
   - |
-    Adds a new cli option to tempest run, --load-list <list-file>
+    Adds a new cli option to tempest run, ``--load-list <list-file>``
     to specify target tests to run from a list-file. The list-file
-    supports the output format of the tempest run --list-tests
+    supports the output format of the tempest run ``--list-tests``
     command.