It appears that use of `isLoggingEnabled()` was erroneously copypasta'd
in many places. This PR updates its docstring to clarify that should
only be used to avoid constructing a potentially expensive docstring.
With this change, the only function that merits/uses this check is
`execCommand()`.
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[//]: # (BEGIN SAPLING FOOTER)
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* #423
* __->__ #420
* #419
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