Bug #1536660: separate two words.

Doc/ref/ref2.tex

@@ -56,7 +56,7 @@ by following the explicit or implicit \emph{line joining} rules.
 
 A physical line is a sequence of characters terminated by an end-of-line
 sequence.  In source files, any of the standard platform line
-termination sequences can be used - the \UNIX form using \ASCII{} LF
+termination sequences can be used - the \UNIX{} form using \ASCII{} LF
 (linefeed), the Windows form using the \ASCII{} sequence CR LF (return
 followed by linefeed), or the Macintosh form using the \ASCII{} CR
 (return) character.  All of these forms can be used equally, regardless