show how to exclude individual files in the exclude example

[ngoldbaum]

It took me about a half hour this morning to puzzle out how to exclude individual files because I didn't realize the example regex excludes only directories. It perhaps took me longer than others since I'm not terribly comfortable with regular expressions but I think this is a common enough desire (to exclude an enumerated list of files along with whole directories) that it should be in the example. Hope you agree 😄.

[coveralls]

Pull Request Test Coverage Report for Build 861

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 91.658%

---

Totals
Change from base Build 858:	0.0%
Covered Lines:	2791
Relevant Lines:	3045

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 861

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 91.658%

---

Totals
Change from base Build 858:	0.0%
Covered Lines:	2791
Relevant Lines:	3045

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 882

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 120 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.05%) to 91.612%

---

Files with Coverage Reduction	New Missed Lines	%
tests/test_black.py	53	92.07%
black.py	67	94.66%

Totals
Change from base Build 858:	-0.05%
Covered Lines:	2796
Relevant Lines:	3052

---

💛 - Coveralls

[JelleZijlstra]

Thanks for this change! While you're at it, I think it would be good to have separate comments for the directories and the individual file. Each of those should say whether it applies to files/dirs anywhere or just at the top level (e.g., will this config exclude some_dir/foo.py as well as foo.py?).

[ngoldbaum]

Done, I think.

[JelleZijlstra]

Thanks!