Use line continuations to indicate which exclusions are for which workarounds.

Author: jaraco

setup.cfg

@@ -31,11 +31,13 @@ testing =
 	pytest >= 4.6
 	pytest-checkdocs >= 2.4
 	pytest-flake8
-	# python_implementation: workaround for jaraco/skeleton#22
-	pytest-black >= 0.3.7; python_implementation != "PyPy"
+	pytest-black >= 0.3.7; \
+		# workaround for jaraco/skeleton#22
+		python_implementation != "PyPy"
 	pytest-cov
-	# python_implementation: workaround for jaraco/skeleton#22
-	pytest-mypy; python_implementation != "PyPy"
+	pytest-mypy; \
+		# workaround for jaraco/skeleton#22
+		python_implementation != "PyPy"
 	pytest-enabler >= 1.0.1
 
 	# local