Bad comments in chai.js (and elsewhere)

[elibarzilay]

Looks like #451 switched many docstring comments from /** to /*! -- where the latter are comments that are not dropped by minifies / bundlers / etc, and are mainly intended for copyright notices. As a result, having chai included in a bundle that esbuild generates has a whole bunch of useless comments at the end (see below). Shouldn't these non-copyright comments use /**?

... all code ...
...
/*!
 * Module dependencies.
 */
/*!
 * Module export.
 */
...