Small errors in the tutorial description

[gitZui]

Dear theicfire,
Thank you very much for the tutorial!
I am very new to Makefiles, but I think there are 2 errors in the tutorial text that can cause confusion:

https://github.com/theicfire/makefiletutorial/blob/eafea236dc3dd31d8928ba3bf33e5a97e1f841cb/docs/index.html#L526
I think it will only run if blah doesn't exist (and not blah.c).

https://github.com/theicfire/makefiletutorial/blob/eafea236dc3dd31d8928ba3bf33e5a97e1f841cb/docs/index.html#L528
If blah.c has not changed, then it should not be recompiled, I guess.

I hope I could help to improve the tutorial!

[chaselambda]

You're totally right, thank you! Fixed.