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This is due to the settings of Pycharm, which considers the term "whole" as to of, of the English "to do" and highlights the content as a way to alert the developer about the pending.
Even you can configure the behavior of the editor in this part.
Such tool can be used, even when doing some commit through own software, giving you the option to check if there was no backlog in the code before versioning it:
His editor interprets "all" as a marker of something pending, something to do - in English "to do". It is common to use TODO in comment to indicate pending.
– bfavaretto