Add subtitle to doc title

EvanQuan · EvanQuan · commit d852a6b3dc84 · 2018-12-23T05:15:55.000-07:00
diff --git a/doc/executioner.txt b/doc/executioner.txt
@@ -7,8 +7,13 @@
            | |___>  <  __/ (__| |_| | |_| | (_) | | | |  __/ |                 ~
            \____/_/\_\___|\___|\__,_|\__|_|\___/|_| |_|\___|_|                 ~
 
+            A Vim plugin to easily execute files in the terminal ~
+            or a separate buffer. ~
+
+
                              Reference Manual                                  ~
 
+
 ==============================================================================
 CONTENTS                                                  *executioner-contents*
 
