Minor wording fix.
diff --git a/Doc/lib/libfcntl.tex b/Doc/lib/libfcntl.tex
index 4391d73..e1350ec 100644
--- a/Doc/lib/libfcntl.tex
+++ b/Doc/lib/libfcntl.tex
@@ -66,8 +66,9 @@
If it is false, the buffer's mutability is ignored and behaviour is
as for a read-only buffer, except that the 1024 byte limit mentioned
- above is avoided -- so long as the buffer you pass is longer than
- what the operating system wants to put there, things should work.
+ above is avoided -- so long as the buffer you pass is as least as
+ long as what the operating system wants to put there, things should
+ work.
If \var{mutate_flag} is true, then the buffer is (in effect) passed
to the underlying \function{ioctl()} system call, the latter's