when @code{fastmap} is nonzero, it automatically compiles a fastmap the
first time you search using a particular compiled pattern.
-By setting the buffer’s @code{fastmap} field before calling
+By setting the buffer's @code{fastmap} field before calling
@code{re_compile_pattern}, you can reuse a buffer data structure across
multiple searches with different patterns, and allocate the fastmap only
once. Nonetheless, the fastmap must be recompiled each time the buffer