Verbose output include information about the settings blue is using for execution

[ChrisCarini]

When trying to add a setting in setup.cfg for line-length, it would be nice to have confirmation that this setting is getting picked up and used during execution of blue:

$ > git diff
diff --git a/setup.cfg b/setup.cfg
index 5bfb82f..2650e6e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,6 +16,9 @@ ignore = E203, E266, E501, W503, PIE781
max-complexity = 12
max-line-length = 100

+[blue]
+line-length = 100
+
[isort]
include_trailing_comma = true
indent = '    '

$ > blue -v src/ test/
src/foobar.egg-info/PKG-INFO ignored: matches the .gitignore file content
src/foobar.egg-info/SOURCES.txt ignored: matches the .gitignore file content
src/foobar.egg-info/requires.txt ignored: matches the .gitignore file content
src/foobar.egg-info/top_level.txt ignored: matches the .gitignore file content
src/foobar.egg-info/dependency_links.txt ignored: matches the .gitignore file content
src/the_company_that_pays_me/foobar/__pycache__/utils.cpython-37.pyc ignored: matches the .gitignore file content
src/the_company_that_pays_me/__pycache__/__init__.cpython-37.pyc ignored: matches the .gitignore file content
test/__pycache__/test_utils.cpython-37-pytest-6.1.2.pyc ignored: matches the .gitignore file content
reformatted /Users/ChrisCarini/code/insights-hub-data_trunk/test/test_utils.py
reformatted /Users/ChrisCarini/code/insights-hub-data_trunk/src/the_company_that_pays_me/foobar/utils.py
All done! ✨ 🍰 ✨
2 files reformatted, 1 files left unchanged.

$ >

[grantjenks]

I'm not sure how easy this is... but it would be great if Black would print all of the configs it's using with some kind of -vvv switch.