Typos detected by Sjoerd
diff --git a/Doc/libfuncs.tex b/Doc/libfuncs.tex
index 088f969..39cb02b 100644
--- a/Doc/libfuncs.tex
+++ b/Doc/libfuncs.tex
@@ -265,7 +265,7 @@
\code{fopen()}: \var{filename} is the file name to be opened,
\var{mode} indicates how the file is to be opened: \code{'r'} for
reading, \code{'w'} for writing (truncating an existing file), and
- \code{'a'} opens it for appending (which on {\em some} {\UNIX}
+ \code{'a'} opens it for appending (which on {\em some} \UNIX{}
systems means that {\em all} writes append to the end of the file,
regardless of the current seek position).
Modes \code{'r+'}, \code{'w+'} and