CLI formatter: print how many files need reformatting

[qwerty287]

Hello!

This patches the command lines formatter to print how many files need reformatting. The report will look like this then:

 247 file(s) scanned.
 247 file(s) checked.
 246 file(s) are well formed.
+1 file(s) need(s) reformatting.

[qwerty287]

@rvishnyakov It would be very cool if you could look at this PR (it changes only one line, reviewing should be easy).