Bumps rdoc from 3.12 to 3.12.2.

Sourced from rdoc's changelog.

=== 3.12.2 / 2013-02-24

• Bug fixes
  • Fixed bug in syntax-highlighting that would corrupt regular expressions. Ruby Bug #6488 by Benny Lyne Amorsen.
  • Fixed lexing of character syntax (?x). Reported by Xavier Noria.
  • Fixed tokenization of % when it is not followed by a $-string type
  • Fixed display of END in documentation examples in HTML output
  • Fixed tokenization of reserved words used as new-style hash keys
  • Fixed HEREDOC output for the limited case of a heredoc followed by a line end. When a HEREDOC is not followed by a line end RDoc is not currently smart enough to restore the source correctly. Bug #162 by Zachary Scott.

=== 3.12.1 / 2013-02-05

• Bug fixes
  • Fixed an XSS exploit in darkfish.js. This could lead to cookie disclosure to third parties. See CVE-2013-0256[rdoc-ref:CVE-2013-0256.rdoc] for full details including a patch you can apply to generated RDoc documentation.
  • Ensured that rd parser files are generated before checking the manifest.

• e210ead Fix test in a cross-ruby way
• 13f339a Added 3.12.2 release date to history
• 751f7ac Fixed .travis.yml by using hoe-travis
• 92c591c Set version to 3.12.2
• 96c3d72 Fixed tests broken by incompetent cherry-picking
• a5fc3d6 Added limited HEREDOC tokenization
• 78ef23e Parse unicode characters above \uFFFF
• 5544853 Tokenize out-of-place reserved words as identifiers
• 24efb01 Gave TkEND_OF_SCRIPT#text a value
• 976d31f Fixed tokenization of "a%1"
• Additional commits viewable in compare view

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