:   '''[encoding] dirs''' ?''directoryList''?

Queries or sets the [list] of directories where [Tcl] finds the [encoding]s it knows about.

Note that a select few encodings are baked directly into Tcl (`utf-8`, `unicode`, `iso8859-1`) because they are critical for operation of Tcl and ensuring that things function correctly even when the encodings are absent.

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