Fixed #15687 -- Fixed small typo in multidb docs. Thanks, jonash

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15919 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/topics/db/multi-db.txt

@@ -144,9 +144,9 @@ A database Router is a class that provides up to four methods:
     the router has no opinion. This method can be used to determine
     the availability of a model on a given database.
 
-A router doesn't have to provide *all* these methods - it omit one or
-more of them. If one of the methods is omitted, Django will skip that
-router when performing the relevant check.
+A router doesn't have to provide *all* these methods -- it may omit one
+or more of them. If one of the methods is omitted, Django will skip
+that router when performing the relevant check.
 
 .. _topics-db-multi-db-hints: