ref: 5d9a054c235b158d648ae144db9f6f61aadca256 anglegrinding/layouts d---------
Override KaTeX shortcode to fix whitespace issues

There is spurious whitespace inserted after math by the shortcode
expansion, resulting in an extra space when the math is inside
parentheses or otherwise not followed by natural whitespace in the file.
This is fixable by adding a whitespace-chomping template at the end of
the file.
Add email link to page footers