run-tests: fix -i when "#testcases" is used in .t test
The "#testcases" feature introduced by
7340465bd788 has issues with "-i"
because "-i" uses "test.name.endswith('.t')" to test if a test is .t or not.
test.name could now be something like "test-foo.t (caseA)" so the above
endswith test is no longer valid.
This patch changes the test to use "self.path" which won't have the issue.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true