Merge pull request #868 from python-cmd2/changelog_clarification

Clarify changes related to removal of attributes from settable

Author: tleonhardt

CHANGELOG.md

@@ -3,7 +3,7 @@
     * Changed the default help text to make `help -v` more discoverable
 * Breaking changes
     * Renamed `locals_in_py` attribute of `cmd2.Cmd` to `self_in_py`
-    * The following public attributes of `cmd2.Cmd` are no longer settable at runtime by end users:
+    * The following public attributes of `cmd2.Cmd` are no longer settable at runtime by default:
         * `continuation_prompt`
         * `self_in_py`
         * `prompt`