fetch: word-wrap help texts at 70 characters

hgext/fetch.py

@@ -16,9 +16,10 b" def fetch(ui, repo, source='default', **"
     This finds all changes from the repository at the specified path
     or URL and adds them to the local repository.
 
-    If the pulled changes add a new branch head, the head is automatically
-    merged, and the result of the merge is committed. Otherwise, the
-    working directory is updated to include the new changes.
+    If the pulled changes add a new branch head, the head is
+    automatically merged, and the result of the merge is committed.
+    Otherwise, the working directory is updated to include the new
+    changes.
 
     When a merge occurs, the newly pulled changes are assumed to be
     "authoritative". The head of the new changes is used as the first