[Bug 261829] lang/expect: fix build with only lang/tcl87 installed

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261829

--- Comment #5 from Dimitry Andric <dim@FreeBSD.org> ---
Created attachment 265606
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=265606&action=edit
lang/expect: fix format string vulnerability in exp_clib.c

(In reply to Shawn Webb from comment #4)
Looks like it was generated a _very_ long time ago using "make makepatch", but
if you run this again you get a patch that is functionally equivalent, but with
lots of context differences.

In any case, something like this new patch should work. I've replaced the
fprintf() calls with simpler fputs() ones. You could also do fprintf(fp, "%s",
str) but I think that is more cumbersome.

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