bookmarks: improve English

hgext/bookmarks.py

@@ -22,7 +22,7 b' experience by adding the following confi'
 track.current = True
 
 This will cause bookmarks to track the bookmark that you are currently
-on, and just updates it. This is similar to git's approach of
+on, and just updates it. This is similar to git's approach to
 branching.
 '''
 
@@ -117,7 +117,7 b' def bookmark(ui, repo, mark=None, rev=No'
     Bookmarks are pointers to certain commits that move when
     commiting. Bookmarks are local. They can be renamed, copied and
     deleted. It is possible to use bookmark names in 'hg merge' and
-    'hg update' to update to a given bookmark.
+    'hg update' to merge and update respectively to a given bookmark.
 
     You can use 'hg bookmark NAME' to set a bookmark on the working
     directory's parent revision with the given name. If you specify