PY-16050 Formatter inserts exactly one space after ":" and "->" in annotations

python/testData/formatter/spaceInAnnotations.py

@@ -1,2 +1,2 @@
-def foo(x : int):
+def foo(x :     int)   ->  object:
     pass

python/testData/formatter/spaceInAnnotations_after.py

@@ -1,2 +1,2 @@
-def foo(x: int):
+def foo(x: int) -> object:
     pass

python/testData/inspections/AddCallSuperSelfNameAndAnnotationPreserved_after.py

@@ -4,6 +4,6 @@ class A:
 
 
 class B(A):
-    def __init__(this:'B', y, x):
+    def __init__(this: 'B', y, x):
         super().__init__(x)
         this.y = y

python/testData/inspections/AddCallSuperTypeAnnotationsPreserved_after.py

@@ -3,5 +3,5 @@ class A:
         pass
 
 class B(A):
-    def __init__(self, d:str, a:int, b:float, *args:tuple, e:bytes, c:complex, **kwargs:dict) -> list:
+    def __init__(self, d: str, a: int, b: float, *args: tuple, e: bytes, c: complex, **kwargs: dict) -> list:
         super().__init__(a, b, *args, c=c, **kwargs)

python/testData/override/typeAnnotations_after.py

@@ -5,6 +5,7 @@ class ArgsTest:
                  comment:str=None, version:int=None): pass
 
 class Sub(ArgsTest):
-    def __init__(self, key:str=None, value:str=None, max_age=None, expires=None, path:str=None, domain:str=None,
-                 secure:bool=False, httponly:bool=False, sync_expires:bool=True, comment:str=None, version:int=None):
-        <selection>super().__init__(key, value, max_age, expires, path, domain, secure, httponly, sync_expires, comment, version)</selection>
+    def __init__(self, key: str=None, value: str=None, max_age=None, expires=None, path: str=None, domain: str=None,
+                 secure: bool=False, httponly: bool=False, sync_expires: bool=True, comment: str=None,
+                 version: int=None):
+        super().__init__(key, value, max_age, expires, path, domain, secure, httponly, sync_expires, comment, version)