Description of problem:

tcsh is behaving very strangely with respect to outputting messages
that involve replacing format specifiers with actual variable values.  
The %d, %s, etc. format specifiers are being output literally, and
some parts of the output are being duplicated.  This occurs in many
different places where tcsh displays messages/prompts for the user.  I
have noticed it so far in the "You have new mail" message and the
prompt that tcsh displays when a tab-completion or ctrl-d completion
output would exceed the listmax setting.

Version-Release number of selected component (if applicable):
tcsh-6.13-9

How reproducible:
Always

Steps to Reproduce:
1. set mail=(1 /var/spool/mail/$USER)
2. send yourself some mail
3. set listmax=75
4. g<ctrl-d> to list completions of commands that begin with 'g'
  
Actual results:

You have You have %smail.
mail.
[test@jet ~]$ g
There are 230 There are %d %s, list them anyway? [n/y] , list them
anyway? [n/y]

Expected results:

You have new mail.
[test@jet ~]$ g
There are 230 items, list them anyway? [n/y]