really small nitpick

[Laurence Darby]

Hi,

I'm just starting to learn autotools, so far I've tried about 1/4 of
4 tutorials, without much success.  Then I RTFM, and overall it's
surprisingly good :)

Starting from scratch, I ran autoscan, but it gave an error message:
autom4te: configure.ac: no such file or directory
autoscan: /usr/bin/autom4te failed with exit status: 1

It's not an actual problem since configure.scan is generated, but the
error is annoying and unnecessary. 

$ touch configure.ac && autoscan

is nice, as the output shows what's going on and it's obvious what to
do next.  So my nitpick is that I think the manual should mention to
create an initial empty configure.ac before running autoscan, in part
3.2.


Thanks,
Laurence