[m-rev.] diff: Fixes for lex_demo.m

[Paul Bone]

On Mon, May 19, 2014 at 12:58:37PM +1000, Paul Bone wrote:
> Branches: master
> 
> Fixes for lex_demo.m
> 
> lex_demo.m wasn't compiling because io.print_line doesn't exist.  I also
> found that drawing the "> " prompt wasn't working as expected.  This patch
> fixes both these issues.
> 

Correction,  print_line is available in the master branch but I was using
the Mercury in my path, which is 14.01, and doesn't have print_line.

In any cause, I think this is still useful as the prompt now makes more
sense.


-- 
Paul Bone