Modify the arguments-differ tests for different output messages

This commit modifies the tests for arguments-differ output messages based on different error cases.
It is part one of the issue pylint-dev#3536

tests/functional/a/arguments_differ_py3.py

@@ -1,40 +1,40 @@
 # pylint: disable=missing-docstring,too-few-public-methods
 class AbstractFoo:
 
-    def kwonly_1(self, first, *, second, third):
+    def kwonly_1(self, first: int, *, second: int, third: int):
         "Normal positional with two positional only params."
 
-    def kwonly_2(self, *, first, second):
+    def kwonly_2(self, *, first: str, second: str):
         "Two positional only parameter."
 
-    def kwonly_3(self, *, first, second):
+    def kwonly_3(self, *, first: str, second: str):
         "Two positional only params."
 
-    def kwonly_4(self, *, first, second=None):
+    def kwonly_4(self, *, first: str, second=None):
         "One positional only and another with a default."
 
-    def kwonly_5(self, *, first, **kwargs):
+    def kwonly_5(self, *, first: bool, **kwargs):
         "Keyword only and keyword variadics."
 
-    def kwonly_6(self, first, second, *, third):
+    def kwonly_6(self, first: float, second: float, *, third: int):
         "Two positional and one keyword"
 
 
 class Foo(AbstractFoo):
 
-    def kwonly_1(self, first, *, second): # [arguments-differ]
+    def kwonly_1(self, first: int, *, second: int): # [arguments-differ]
         "One positional and only one positional only param."
 
-    def kwonly_2(self, first): # [arguments-differ]
+    def kwonly_2(self, *, first: str): # [arguments-differ]
         "Only one positional parameter instead of two positional only parameters."
 
-    def kwonly_3(self, first, second): # [arguments-differ]
+    def kwonly_3(self, **kwargs):
         "Two positional params."
 
-    def kwonly_4(self, first, second): # [arguments-differ]
+    def kwonly_4(self, *args): # [arguments-differ]
         "Two positional params."
 
-    def kwonly_5(self, *, first): # [arguments-differ]
+    def kwonly_5(self, *, first: bool): # [arguments-differ]
         "Keyword only, but no variadics."
 
     def kwonly_6(self, *args, **kwargs): # valid override

tests/functional/a/arguments_differ_py3.txt

@@ -1,5 +1,4 @@
-arguments-differ:25:4:Foo.kwonly_1:Parameters differ from overridden 'kwonly_1' method
-arguments-differ:28:4:Foo.kwonly_2:Parameters differ from overridden 'kwonly_2' method
-arguments-differ:31:4:Foo.kwonly_3:Parameters differ from overridden 'kwonly_3' method
-arguments-differ:34:4:Foo.kwonly_4:Parameters differ from overridden 'kwonly_4' method
-arguments-differ:37:4:Foo.kwonly_5:Parameters differ from overridden 'kwonly_5' method
+arguments-differ:25:4:Foo.kwonly_1:Number of parameters has changed in overridden 'Foo.kwonly_1' method
+arguments-differ:28:4:Foo.kwonly_2:Number of parameters has changed in overridden 'Foo.kwonly_2' method
+arguments-differ:34:4:Foo.kwonly_4:Number of parameters has changed in overridden 'Foo.kwonly_4' method
+arguments-differ:37:4:Foo.kwonly_5:Variadics removed in overridden 'Foo.kwonly_5' method