Item12526: Bracketed links don't recognize all anchors generated for TML headings

Foswiki::Render::Anchors generates anchors out of HTML/TML headings, escaping all characters but alphanumerics, underscores, dots, and colons (A-Za-z0-9_.:). The code that formats bracketed links, however, only recognizes alphanumerics and underscores as valid characters in anchors (defined by $Foswiki::regex{anchorRegex}).

The result is that a link like [[#Foo.Bar]] will be incorrectly treated as a WikiWord and expanded to a link pointing to .../Foo/Bar.

The regex should be updated to match what is being generated, at the very least (technically many more characters are valid in URI fragments).

-- JanKrueger - 04 Jun 2013

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