Using a type alias with arguments in `case` block in a `match` statement gets the wrong error message with `parameters` instead of `arguments`

*Memo:

• mypy test.py
• mypy 1.19.1
• Python 3.14
• Windows 11

Using a type alias with arguments in case block in a match statement gets the wrong error message with parameters instead of arguments as shown below:

class Cls:
    def __init__(self, x: int, y: int):
        self.x = x
        self.y = y

type TA = Cls

match Cls(x=10, y=20):
    case TA(x=10, y=20):
        print("OK")

error: Class pattern class must not be a type alias with type parameters

So, the error message should be with arguments instead of parameters as shown below:

error: Class pattern class must not be a type alias with type arguments

Start by reproducing the report with mypy test.py using mypy 1.19.1 and Python 3.14, then locate the diagnostic for a type alias used in a class pattern. Update the wording from “type parameters” to “type arguments” and verify that the example reports the corrected message.