Low-hanging fruit: /SQUERY fails with multiple arguments

[J.P.]

Description:

 After issuing /SQUERY <service> <more> ... <stuff>, an error message is
 produced saying something like "Incorrect arguments. Usage ...".

Hints:

 Where does this message come from? Can you cite a realistic example
 (ideally a log snippet) from a network still using SQUERY? How many
 args ought to be expected? How does ERC know when to parse user input
 for a particular /CMD? How might you write a test for such a mechanism?

Difficulty: 2

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that's you, please find a way to reproduce the bug, and then open a
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