• Fixed rules for _-based emphasis and strong emphasis (#317). Previously _(bar)_. was not parsed as containing emphasis because the closing delimiter is both left- and right- flanking. This fix allows such delimiters, provided they're followed by punctuation (i.e., they have punctuation on both sides). Similarly, mutatis mutandis, for opening delimiters and for __.
• Clarified definitions of left-flanking and right-flanking (#310). The spec now says explicitly that the beginning and end of line count as whitespace for purposes of this definition.
• Clarified that a code fence followed by header line isn't a header (#306).
• Fixed alignment in flankingness examples (cosmetic).
• Fixed last "right flanking but not left flanking" example (#316).
• Fixed a broken link (Konstantin Zudov).
• Added link to list of implementations on wiki.
• Fixed mistake in examples of left/right flanking delimiters (Konstantin Zudov).
• Spell out iff (if and only if) the first time it is used (#309).
• Fixed typos (isoroku, #309).
• Clarified wording for soft line break: newline can't be preceded by two spaces or a backslash.
• Replaced some references to UTF-8 that should be to unicode.
• Fixed dingus link in tools/template.html.
• Replaced obsolete reference to spec2md.pl in spec (#304).