scalafmt tests

The file extension determines how the code should be parsed

*.stat parses as a statement (most common)
*.case parses as a case
*.source parses as a full compilation unit

Here is an example test suite in a file test/resources/Foo/foo.stat:

maxColumn = 40 # configuration is defined at the top of the file
<<< This is the test name
val x = "This can be an arbirary statement"
>>>
val x =
  "This can be an arbirary statement"

Prefix a test name with ONLY to only run that single test.

<<< ONLY only run this test, useful when testing a single case.
  "This statement is the original code"
>>>
"This statement is the expected formatting output. " +
"Obviously, this test will fail."

Prefix a test name with SKIP to skip that single test.

<<< SKIP do not run me, useful to temporarily quiet failing tests.
  "I test new features that don't work yet."
>>>
"I test new features that don't work yet."

Put ONLY at the top of the file to only run tests in this file.

ONLY maxColumn = 40
<<< test 1
foo (1)
>>>
foo(1)
<<< test 2
bar (2)
>>>
bar(2)

If you are unsure which directory to put your test in, put it in test/resources/test.