Fixed doc generation errors

Author: kmvanbrunt

CHANGELOG.md

@@ -4,7 +4,8 @@
 * Enhancements
     * Enabled line buffering when redirecting output to a file
     * Added `align_left()`, `align_center()`, and `align_right()` to utils.py. All 3 of these functions support
-    ANSI escape sequences and characters with display widths greater than 1.
+    ANSI escape sequences and characters with display widths greater than 1. They wrap `align_text()` which
+    is also in utils.py.
 
 ## 0.9.21 (November 26, 2019)
 * Bug Fixes

docs/api/utility_functions.rst

@@ -9,7 +9,13 @@ Utility Functions
 
 .. autofunction:: cmd2.decorators.categorize
 
-.. autofunction:: cmd2.utils.center_text
+.. autofunction:: cmd2.utils.align_text
+
+.. autofunction:: cmd2.utils.align_left
+
+.. autofunction:: cmd2.utils.align_center
+
+.. autofunction:: cmd2.utils.align_right
 
 .. autofunction:: cmd2.utils.strip_quotes