109&^*&#^() Must Start With Alpha
Strip out &^% characters ^&*^
Special Cross Reference Cases
1 Cross-References: Special Characters!@#$%^&*()<>
And now, link to 1 Cross-References: Special Characters!@#$%^&*()<>
Setext 1
Setext 2
Atx 1
Link to Setext 1.
And Setext 2.
And Atx 1.
And [Atx 2] should fail.
Manual Header
Manual Header 2
Manual Header 3