[Bug] unused-argument doesn't detect certain formats of usage

[isteptoe]

What happened?

Using this file, robocop reports some unused-arguments where they are used

test.robot

*** Test Cases ***
Variable Test
    Used Arguments    test    test    test

*** Keywords ***
Used Arguments
    [Arguments]    ${arg1}    ${arg2}    ${arg3}
    Log    ${arg1 == "test"}    level=warn
    Log    ${arg2}    level=warn

It looks like it doesn't read the first Log properly

Using:
python 3.10.0
robocop 5.4.0 robotframwork 7.0.1

What command/code did you try to run?

python -m robocop -i unused-argument test.robot

What is the full error message?

[W] 0919 Keyword argument '${arg1}' is not used (unused-argument)
[W] 0919 Keyword argument '${arg3}' is not used (unused-argument)

What did you expect to happen instead?

Only arg3 is unused

Operating System

Windows, Linux

Robocop version

5.4.0