Revert separation of <hN> and .hN heading styles
This reverts commit deeb74e321f8ba676dce8f13809c2aace0e0c537. Reverts #18038 Fixes #18992 [skip sauce] [skip validator]
C
Chris Rebert committed
23979a999488ce38f5e349f36ffef485ba01c897
Parent: 1d277de