surprisingly frequent. The interface is similar to @code{memchr} except
that the @var{size} parameter is missing. The function will look beyond
the end of the block pointed to by @var{block} in case the programmer
-made in error in assuming that the byte @var{c} is present in the block.
+made an error in assuming that the byte @var{c} is present in the block.
In this case the result is unspecified. Otherwise the return value is a
pointer to the located byte.