+.SH EXAMPLE
+.IP
+lex lexcommands
+.PP
+would draw
+.I lex
+instructions from the file
+.I lexcommands,
+and place the output in
+.I lex.yy.c
+.IP ""
+.nf
+.ta \w'[A\-Z] 'u
+%%
+[A\-Z] putchar(yytext[0]+\'a\'\-\'A\');
+[ ]+$ ;
+[ ]+ putchar(\' \');
+.fi
+.PP
+is an example of a
+.I lex
+program that would be put into a
+.I lex
+command file. This program converts upper case to lower,
+removes blanks at the end of lines,
+and replaces multiple blanks by single blanks.