Correct typos and markup errors (Raymond, thanks for texcheck)
diff --git a/Doc/lib/libmmap.tex b/Doc/lib/libmmap.tex
index 99fdc5b..e7db814 100644
--- a/Doc/lib/libmmap.tex
+++ b/Doc/lib/libmmap.tex
@@ -63,7 +63,7 @@
\strong{(\UNIX{} version)} Maps \var{length} bytes from the file
specified by the file descriptor \var{fileno}, and returns a mmap
object. If \var{length} is \code{0}, the maximum length of the map
- will be the current size of the file when \function{mmap(} is
+ will be the current size of the file when \function{mmap()} is
called.
\var{flags} specifies the nature of the mapping.