Table centering is producing `align="center"` instead of `style="text-align: center"` about commonmark

[colinodell]

Thanks for catching this! Looks like that example has been incorrect since we switched to align= in v1.3.0 (when we adopted the GFM spec - see #409). I'll get the docs fixed shortly.

[ptmkenny]

@colinodell Ok, thanks for confirming that the output is as expected!

I discovered this issue by running the W3C validator on my site, which produced the following error for the tables:

From line 339, column 25; to line 340, column 19 in resource file:/example.com/style-guide.html
Error: The "align" attribute on the "th" element is obsolete. Use CSS instead.

I understand that following the GFM spec means that the default behavior can't be changed, but do have any suggestions on how I might override the Tables extension to produce CSS instead of the align attribute for my site?

[colinodell]

You'd likely need to override TableCellRenderer somehow - either by decorating or replacing it.

Given that align is indeed obsolete, we could add a new configuration option making it easier to switch between the different options. I'll put together a PR in a few minutes with how that might look :)