check-format.pl: Document how to run positive and negative self-tests
# [-h|--sloppy-hang] [-1|--1-stmt]
# <files>
#
+# run self-tests:
+# util/check-format.pl util/check-format-test-positives.c
+# util/check-format.pl util/check-format-test-negatives.c
+#
# checks adherence to the formatting rules of the OpenSSL coding guidelines
# assuming that the input files contain syntactically correct C code.
# This pragmatic tool is incomplete and yields some false positives.
