On katex.org, enter T_\max

Resulting behavior:

KaTeX parse error: Got function '\max' with no arguments as subscript at position 3: T_\̲m̲a̲x̲

Expected behavior: This should be identical to T_{\max}, which does work fine in KaTeX. The T_\max does work in LaTeX and MathJax: http://jbergknoff.github.io/mathjax-sandbox/#JFRfXG1heCQ%3D

Superscripts and subscripts should not require braces.