PY-11561 Preserve existing type annotations in the modified constructor

python/src/com/jetbrains/python/inspections/quickfix/AddCallSuperQuickFix.java

@@ -91,7 +91,11 @@ public class AddCallSuperQuickFix implements LocalQuickFix {
       newFunction.append(", ");
     }
     StringUtil.join(newParameters, ", ", newFunction);
-    newFunction.append("):\n\t");
+    newFunction.append(")");
+    if (problemFunction.getAnnotation() != null) {
+      newFunction.append(problemFunction.getAnnotation().getText());
+    }
+    newFunction.append(":\n\t");
 
     final List<String> superCallArguments = couple.getSecond();
     if (addComma && !superCallArguments.isEmpty()) {

python/testData/inspections/AddCallSuperAnnotations_after.py

@@ -4,5 +4,5 @@ class Example1:
 
 
 class Example2(Example1):
-    def __init__(self, field1):
+    def __init__(self, field1: str):
         super().__init__(field1)

python/testData/inspections/AddCallSuperTypeAnnotationsPreserved.py

@@ -0,0 +1,7 @@
+class A:
+    def __init__(self, a:int, b:float, *args:tuple, c:complex, **kwargs:dict) -> None:
+        pass
+
+class B(A):
+    def <warning descr="Call to __init__ of super class is missed">__i<caret>nit__</warning>(self, d:str, *, e:bytes) -> list:
+        pass

python/testData/inspections/AddCallSuperTypeAnnotationsPreserved_after.py

@@ -0,0 +1,7 @@
+class A:
+    def __init__(self, a:int, b:float, *args:tuple, c:complex, **kwargs:dict) -> None:
+        pass
+
+class B(A):
+    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/testSrc/com/jetbrains/python/PyQuickFixTest.java

@@ -400,7 +400,17 @@ public class PyQuickFixTest extends PyTestCase {
                          PyBundle.message("QFIX.add.super"), true, true);
       }
     });
+  }
 
+  // PY-15867
+  public void testAddCallSuperTypeAnnotationsPreserved() {
+    runWithLanguageLevel(LanguageLevel.PYTHON30, new Runnable() {
+      @Override
+      public void run() {
+        doInspectionTest("AddCallSuperTypeAnnotationsPreserved.py", PyMissingConstructorInspection.class,
+                         PyBundle.message("QFIX.add.super"), true, true);
+      }
+    });
   }
 
   //PY-491, PY-13297