Manual HTTPS tests incorrectly listed as automated tests in manifest

[tidoust]

Manual tests need to end with -manual.[ext]. The convention for HTTPS tests is to end the test file name with a .https.html extension. Manual tests that need to run over HTTPS are thus typically named [testname]-manual.https.html.

Manifest generation incorrectly lists these tests in the testharness section of the manifest.

I think the problem is line 60 in sourcefile.py, which tries to extract manual (or ref) from the filename but ends up with manual.https in this case.

Test files currently affected by this bug:

• https://github.com/w3c/web-platform-tests/blob/master/mediacapture-streams/MediaStream-id-manual.https.html
• https://github.com/w3c/web-platform-tests/blob/master/presentation-api/controlling-ua/startNewPresentation_mixedcontent-manual.https.html
• https://github.com/w3c/web-platform-tests/blob/master/presentation-api/controlling-ua/startNewPresentation_mixedcontent_multiple-manual.https.html