fix(documentation): remove a line after '## Presentations'
fix(documentation): remove a line after '## Presentations'
leanprover/leanprover.github.io,leanprover/leanprover.github.io,avigad/leanprover.github.io,soonhokong/leanprover.github.io,fpvandoorn/leanprover.github.io,leanprover/leanprover.github.io,soonhokong/leanprover.github.io,soonhokong/leanprover.github.io,fpvandoorn/leanprover.github.io,fpvandoorn/leanprover.github.io,avigad/leanprover.github.io,avigad/leanprover.github.io