* doc/emacs/maintaining.texi (Advanced C-x v v): Make the
documentation of "C-u C-x v v" match what the code does.
Branches}). An empty argument (i.e., @kbd{C-u C-x v v @key{RET}})
checks out the latest (head) revision on the current branch.
-This signals an error on a decentralized version control system.
+This is silently ignored on a decentralized version control system.
Those systems do not let you specify your own revision IDs, nor do
they use the concept of checking out individual files.
@end itemize