-Merges the history specified by <commit> into HEAD, optionally using a
-specific merge strategy.
+Incorporates changes from the named commits (since the time their
+histories diverged from the current branch) into the current
+branch. This command is used by 'git pull' to incorporate changes
+from another repository and can be used by hand to merge changes
+from one branch into another.
+Assume the following history exists and the current branch is
+Then "`git merge topic`" will replay the changes made on the
+`topic` branch since it diverged from `master` (i.e., `E`) until
+its current commit (`C`) on top of `master`, and record the result
+in a new commit along with the names of the two parent commits and
+a log message from the user describing the changes.
+ D---E---F---G---H master
The second syntax (<msg> `HEAD` <commit>...) is supported for
historical reasons. Do not use it from the command line or in