A gist to check if Github has deployed the Racket lexer

gistfile1.md

Before Github deploys the Racket lexer from pygments-main via pygments.rb, the following will appear as plain, black monospace. After they deploy, this will appear color-coded:

(let ([x 0])
  x)

Then it will look similar to the Scheme lexer (below) but, as the most glaring example, brackets will not be colored as errors:

(let ([x 0])
  x)

Still waiting on the Racket lexer to flow through into Linguist (should be any day now). Meanwhile, it looks like the Scheme lexer now accepts square brackets as non-errors, so the most obvious issue with that lexer is now N/A.