spacing in py3 annotations (PY-8961)

python/src/com/jetbrains/python/formatter/PythonFormattingModelBuilder.java

@@ -84,6 +84,7 @@ public class PythonFormattingModelBuilder implements FormattingModelBuilderEx, C
       .afterInside(GT, ANNOTATION).spaces(1)
       .betweenInside(MINUS, GT, ANNOTATION).none()
       .beforeInside(ANNOTATION, FUNCTION_DECLARATION).spaces(1)
+      .beforeInside(ANNOTATION, NAMED_PARAMETER).none()
 
       .between(allButLambda(), PARAMETER_LIST).spaceIf(commonSettings.SPACE_BEFORE_METHOD_PARENTHESES)
 

python/testData/formatter/spaceInAnnotations.py

@@ -0,0 +1,2 @@
+def foo(x : int):
+    pass

python/testData/formatter/spaceInAnnotations_after.py

@@ -0,0 +1,2 @@
+def foo(x: int):
+    pass

python/testSrc/com/jetbrains/python/PyFormatterTest.java

@@ -66,6 +66,10 @@ public class PyFormatterTest extends PyTestCase {
   }
 
   public void testStarExpression() {  // PY-1523
+    doTestPy3();
+  }
+
+  private void doTestPy3() {
     PythonLanguageLevelPusher.setForcedLanguageLevel(myFixture.getProject(), LanguageLevel.PYTHON30);
     try {
       doTest();
@@ -304,6 +308,10 @@ public class PyFormatterTest extends PyTestCase {
     }
   }
 
+  public void testSpaceInAnnotations() {  // PY-8961
+    doTestPy3();
+  }
+
   private void doTest() {
     myFixture.configureByFile("formatter/" + getTestName(true) + ".py");
     ApplicationManager.getApplication().runWriteAction(new Runnable() {