Add stub for the keep_warnings config value in quickstart's conf.py

CHANGES

@@ -6,6 +6,9 @@ Release 1.2 (in development)
 * Fix text builder did not respect wide/fullwidth characters:
   title underline width, table layout width and text wrap width.
 
+* Add stub for the :confval:`keep_warnings` configuration value in the
+  ``conf.py`` generated by sphinx-quickstart.
+
 * Speed up building the search index by caching the results of the word
   stemming routines.  Saves about 20 seconds when building the Python
   documentation.

sphinx/quickstart.py

@@ -126,6 +126,9 @@ pygments_style = 'sphinx'
 # A list of ignored prefixes for module index sorting.
 #modindex_common_prefix = []
 
+# If true, keep warnings as "system message" paragraphs in the built documents.
+#keep_warnings = False
+
 
 # -- Options for HTML output ---------------------------------------------------