Bad spacing inside MathML formulas when text-indent is specified
https://bugs.webkit.org/show_bug.cgi?id=106600

Patch by Frédéric Wang <fred.wang@free.fr> on 2013-05-17
Reviewed by Martin Robinson.

Source/WebCore:

When MathML is used in a HTML page that modifies the CSS text-indent,
large gaps appear inside the mathematical expressions. Resetting it to
0 on the math root (as Gecko does) fixes the issue.

Tests: mathml/presentation/text-indent.html
       mathml/presentation/text-indent-expected.html

* css/mathml.css:
(math): reset text-indent to its default value.

LayoutTests:

New test to verify that the text-indent property is reset to 0 on
the MathML root.

* mathml/presentation/text-indent-expected.html: Added.
* mathml/presentation/text-indent.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150264 268f45cc-cd09-0410-ab3c-d52691b4dbfc