Update comment to reference terminal escapes as an example

Seems like we're getting closer to a final colour for the bikeshed.

Co-authored-by: Simon Lydell <simon.lydell@gmail.com>

Author: zwilias

lib/Supervisor.js

@@ -207,8 +207,8 @@ function run(
                 // those characters, rather than crashing. In an attempt to
                 // retain useful information in the output, we try and output a
                 // hex-encoded unicode codepoint for the invalid character. For
-                // example, a backspace (`\u{0008}` in Elm) will be output as a
-                // literal `\u{0008}`.
+                // example, the start of a terminal escape (`\u{001B}` in Elm) will be output as a
+                // literal `\u{001B}`.
                 var invalidCharReplacement = function (char) {
                   return (
                     '\\u{' +