--- ch15.t	Sat Sep 14 16:47:09 2002
+++ ch15.t.fixed	Sat Sep 14 16:45:48 2002
@@ -1137,13 +1137,16 @@
 key.
 .Pe
 will produce the line:
-.Ps
-.fi	\"needed since .Ps/.Pe normally uses .nf
+.	\" Note: originally, this was in a .Ps/.Pe pair
+.	\" and worked okay unless the chapter was included with
+.	\" other chapters, and processed via groff- t -s -ms 
+.	\" then you got "can't break line. Removing the .Ps/.Pe
+.	\" pair corrects the problem.
+.sp
 \f[R]Press the
 \(br\|RETURN\|\(br\l'|0\(rn'\l'|0\(ul'\^
 key.\fP
-.nf
-.Pe
+.sp
 This macro prints a single box rule
 (\c
 .CW \ebr  ),
@@ -1511,13 +1514,13 @@
 .Pe
 If either of these things were done, our earlier example would
 look like this, which is even better:
-.Ps
-.fi
+.	\" Note: see note for line 1142 about why this was
+.	\" changed.
+.sp
 Press the
 \(br\|\s-2RETURN\s0\|\(br\l'|0\(rn'\l'|0\(ul'\^
 key.
-.nf
-.Pe
+.sp
 .Bh "Drawing Curves"
 The previous line drawing escape sequences work in
 .CW nroff