Update 145 DOM doc links to use proper Markdown; fix 56 broken links

Update 145 DOM doc links to use proper Markdown; fix 56 broken links

BUG= https://github.com/dart-lang/sdk/issues/23601

Tested with dartdoc package at HEAD with new markdown package 0.9. Looks great.

R=alanknight@google.com

Committed: https://github.com/dart-lang/sdk/commit/974b461235021bf9530ea0f9fcc6dc95a276f74c

[srawlins, 2015-11-13 17:05:22]

srawlins@google.com changed reviewers:
+ alanknight@google.com, kevmoo@google.com, sethladd@google.com

[srawlins, 2015-11-13 17:05:23]

This CL should fix the last of https://github.com/dart-lang/sdk/issues/23601

The gist is changing markdown links with a space between the [text] and the
(url) so there is no space: [text](url).

Alan mentioned that many links might be out of date, so I tried many of them,
and ended up fixing 56 links.

[srawlins, 2015-11-13 17:07:07]

Description was changed from

==========
Update 145 DOM doc links to use proper Markdown; fix 56 broken links

BUG= https://github.com/dart-lang/sdk/issues/23601
==========

to

==========
Update 145 DOM doc links to use proper Markdown; fix 56 broken links

BUG= https://github.com/dart-lang/sdk/issues/23601

Tested with dartdoc package at HEAD with new markdown package 0.9. Looks great.
==========

[sethladd, 2015-11-13 17:07:31]

Are these links generated by some tool?

[srawlins, 2015-11-13 17:09:20]

On 2015/11/13 17:07:31, sethladd wrote:
> Are these links generated by some tool?

From alan, https://github.com/dart-lang/sdk/issues/23601#issuecomment-156242794:

> Those comments are generated out of the docs.json file, which
> has been passed down to us through the generations. It was once
> generated from somewhere else, or combined with data from
> elsewhere, but I'm pretty sure that if you edit them in there that
> will get propogated into html_dartium.dart and html_dart2js.dart

[Alan Knight, 2015-11-13 18:13:09]

lgtm

Very nice.

[srawlins, 2015-11-13 19:43:54]

Committed patchset #1 (id:1) manually as
974b461235021bf9530ea0f9fcc6dc95a276f74c (presubmit successful).