identify: further clarification of help

Following on to 1416b9118540, correct a minor grammar issue, re-wrap to
72 columns, and further clarify wording.

mercurial/commands.py

@@ -2244,10 +2244,10 b' def identify(ui, repo, source=None, rev='
              num=None, id=None, branch=None, tags=None, bookmarks=None):
     """identify the working copy or specified revision
 
-    Print a summary identifiying the repository state at REV
-    using one or two parent hash identifiers, followed by a
-    "+" if there are uncommitted changes in the working directory,
-    the branch name (omitted if default) and a list of tags, bookmarks.
+    Print a summary identifying the repository state at REV using one or
+    two parent hash identifiers, followed by a "+" if the working
+    directory has uncommitted changes, the branch name (if not default),
+    a list of tags, and a list of bookmarks.
 
     When REV is not given, print a summary of the current state of the
     repository.