gofmt
Disallow blank space between [label] and ( in inline link. [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/1a629de
Improved strong/emph parsers to avoid exponential blowup. [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/c59e682
Require only one character for setext header lines. [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/ce835e5
Removed unused parser. [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/400b390
Fixed Endline to allow 1 and 2-character setext header lines. [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/482a0ba
Rewrote Emph/Strong parsers to avoid exponential blowup. [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/39dfc1c
Removed unused disjunct in SourceContents. [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/2a19a38
Efficiency improvement (!Whitespace instead of &Nonspacechar). [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/c95552a
Only obfuscate ascii characters. [jgm/peg-markdown]

See https://github.com/jgm/peg-markdown/commit/9ff58c2
update parser.leg.go