Faulty Null-Check Suspected in ToolProvider

[Philipp Kunz]

Hi,

There has always been an implicit null-check for args by the for loop
attempting to iterate but the check seems to be intended and wrong for
the elements. See attached patch.
>From the comment to args, "the command-line arguments for the tool", I
guess it makes sense to conclude that these should not be allowed to be
null, just like on a command line, but empty strings are be fine.

Regards,
Philipp
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