unshelve: correct help string; unshelve does not accept file list

The non-option arguments to `hg unshelve` are interpreted as the name of the
shelve to unshelve, not the list of files to unshelve. While that functionality
would probably be nice to have, that's well beyond the scope of this
documentation fix.

Differential Revision: https://phab.mercurial-scm.org/D7365

mercurial/commands.py

@@ -7525,7 +7525,7 b' def unbundle(ui, repo, fname1, *fnames, '
             _(b'DATE'),
         ),
     ],
-    _(b'hg unshelve [OPTION]... [FILE]... [-n SHELVED]'),
+    _(b'hg unshelve [OPTION]... [[-n] SHELVED]'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
 )
 def unshelve(ui, repo, *shelved, **opts):
@@ -7549,9 +7549,9 b' def unshelve(ui, repo, *shelved, **opts)'
     that causes a conflict. This reverts the unshelved changes, and
     leaves the bundle in place.)
 
-    If bare shelved change (when no files are specified, without interactive,
-    include and exclude option) was done on newly created branch it would
-    restore branch information to the working directory.
+    If bare shelved change (without interactive, include and exclude
+    option) was done on newly created branch it would restore branch
+    information to the working directory.
 
     After a successful unshelve, the shelved changes are stored in a
     backup directory. Only the N most recent backups are kept. N