Fix typo. Close #1625

Author: PCManticore

doc/user_guide/output.rst

@@ -101,7 +101,7 @@ Reports section
 Following the analysis message, Pylint can display a set of reports,
 each one focusing on a particular aspect of the project, such as number
 of messages by categories, modules dependencies. These features can
-be enabled through the ``--report=y`` option, or its shorthand
+be enabled through the ``--reports=y`` option, or its shorthand
 version ``-rn``.
 
 For instance, the metrics report displays summaries gathered from the