Fix a bunch of repeated-word typos

Mostly in comments and docs, but some in diagnostic messages and one
case of 'or die die'.

1 files changed, 1 insertions, 1 deletions

diff --git a/handy.h b/handy.h
index e5062e647a..fd0866828c 100644
--- a/handy.h
+++ b/handy.h
@@ -504,7 +504,7 @@ based on the underlying C library functions):
   length may be unknown, but can be calculated by C<strlen()>, since it is
   terminated by a NUL, which isn't included in its length.
 
-  The optional 'n' following 'str' means that that there is a third parameter,
+  The optional 'n' following 'str' means that there is a third parameter,
   giving the maximum number of bytes to look at in each string.  Even if both
   strings are longer than the length parameter, those extra bytes will be
   unexamined.