Document the '--log/-l` option

Signed-off-by: Michael Haggerty <[email protected]>

Author: mhagger

README

@@ -28,6 +28,7 @@ Options:
                         characters (or more if needed to avoid ambiguity).
                         See also whenmerged.abbrev below under CONFIGURATION.
   --no-abbrev           Do not abbreviate commit SHA1s.
+  -l, --log             Show the log for the merge commit.
   -d, --diff            Show the diff for the merge commit.
   -v, --visualize       Visualize the merge commit using gitk.
 

bin/git-when-merged

@@ -49,7 +49,8 @@ Examples:
   git when-merged 0a1b -n releases         # Use whenmerged.releases.pattern
   git when-merged 0a1b -s                  # Use whenmerged.default.pattern
 
-  git when-merged 0a1b -d feature-1        # Show diff for each merge commit
+  git when-merged 0a1b -l feature-1        # Show log for the merge commit
+  git when-merged 0a1b -d feature-1        # Show diff for the merge commit
   git when-merged 0a1b -v feature-1        # Display merge commit in gitk
 
 Configuration: