shred --help: lowercase a stray capital

src/shred.c

@@ -166,7 +166,7 @@ Mandatory arguments to long options are mandatory for short options too.\n\
 "), stdout);
       printf (_("\
   -f, --force    change permissions to allow writing if necessary\n\
-  -n, --iterations=N  Overwrite N times instead of the default (%d)\n\
+  -n, --iterations=N  overwrite N times instead of the default (%d)\n\
       --random-source=FILE  get random bytes from FILE (default /dev/urandom)\n\
   -s, --size=N   shred this many bytes (suffixes like K, M, G accepted)\n\
 "), DEFAULT_PASSES);