Merge branch 'jk/fetch-prune-doc' into maint

Minor doc update.

* jk/fetch-prune-doc:
  fetch: document that pruning happens before fetching

Author: gitster

Documentation/fetch-options.txt

@@ -52,7 +52,7 @@ ifndef::git-pull[]
 
 -p::
 --prune::
-	After fetching, remove any remote-tracking references that no
+	Before fetching, remove any remote-tracking references that no
 	longer exist on the remote.  Tags are not subject to pruning
 	if they are fetched only because of the default tag
 	auto-following or due to a --tags option.  However, if tags