pylint #123233 Warn about duplicate argument names [validation pending]

Detection of duplicate argument names is handled after the actual parsing (pass 2 syntax errors) and thus does not lead to a syntax error in pylint. Pylint should have a separate warning for them.

prioritynormal
typeenhancement
done in0.28.0
load left0.000
closed by#99877884076d Warn about duplicate argument names. Python raises a SyntaxError, but it's not
patchWarn about duplicate argument names. Python raises a SyntaxError, but it's not [applied]