fixed PY-11484 Implement abstract method: pushes docstring out of the way

python/src/com/jetbrains/python/codeInsight/override/PyOverrideImplementUtil.java

@@ -156,7 +156,8 @@ public class PyOverrideImplementUtil {
     final int offset = editor.getCaretModel().getOffset();
     PsiElement anchor = null;
     for (PyStatement statement: statementList.getStatements()) {
-      if (statement.getTextRange().getStartOffset() < offset) {
+      if (statement.getTextRange().getStartOffset() < offset ||
+          (statement instanceof PyExpressionStatement && ((PyExpressionStatement)statement).getExpression() instanceof PyStringLiteralExpression)) {
         anchor = statement;
       }
     }

python/testData/override/docstring.py

@@ -0,0 +1,9 @@
+class Abstract(object):
+
+  @abstractmethod
+  def foo(self, bar):
+    pass
+
+
+class Concrete(Abstract):
+  """The docstring."""

python/testData/override/docstring_after.py

@@ -0,0 +1,12 @@
+class Abstract(object):
+
+  @abstractmethod
+  def foo(self, bar):
+    pass
+
+
+class Concrete(Abstract):
+  """The docstring."""
+
+  def foo(self, bar):
+      <selection>super(Concrete, self).foo(bar)</selection>

python/testSrc/com/jetbrains/python/PyOverrideTest.java

@@ -130,6 +130,10 @@ public class PyOverrideTest extends PyTestCase {
     doTest3k();
   }
 
+  public void testDocstring() {
+    doTest();
+  }
+
   // PY-10229
   public void testInstanceCheck() {
     myFixture.configureByFile("override/" + getTestName(true) + ".py");