add //= to augmented assignment operators

python/src/com/jetbrains/python/PyTokenTypes.java

@@ -144,7 +144,7 @@ public class PyTokenTypes {
   public static final TokenSet CLOSE_BRACES = TokenSet.create(RBRACKET, RBRACE, RPAR);
 
   public static final TokenSet AUG_ASSIGN_OPERATIONS = TokenSet.create(PLUSEQ, MINUSEQ, MULTEQ, DIVEQ,
-      PERCEQ, EXPEQ, GTGTEQ, LTLTEQ, ANDEQ, OREQ, XOREQ);
+      PERCEQ, EXPEQ, GTGTEQ, LTLTEQ, ANDEQ, OREQ, XOREQ, FLOORDIVEQ);
 
   public static final PyElementType BACKSLASH = new PyElementType("BACKSLASH");
 

python/src/com/jetbrains/python/psi/PyFileElementType.java

@@ -24,7 +24,7 @@ public class PyFileElementType extends IStubFileElementType {
 
   @Override
   public int getStubVersion() {
-    return 9;
+    return 10;
   }
 
   @Override

python/testData/psi/FloorDiv.py

@@ -0,0 +1 @@
+a //= 2

python/testData/psi/FloorDiv.txt

@@ -0,0 +1,9 @@
+PyFile:FloorDiv.py
+  PyAugAssignmentStatement
+    PyReferenceExpression: a
+      PsiElement(Py:IDENTIFIER)('a')
+    PsiWhiteSpace(' ')
+    PsiElement(Py:FLOORDIVEQ)('//=')
+    PsiWhiteSpace(' ')
+    PyNumericLiteralExpression
+      PsiElement(Py:INTEGER_LITERAL)('2')

python/testSrc/com/jetbrains/python/PythonParsingTest.java

@@ -182,6 +182,10 @@ public class PythonParsingTest extends ParsingTestCase {
     doTest(LanguageLevel.PYTHON30);
   }
 
+  public void testFloorDiv() throws Exception {
+    doTest();
+  }
+
   public void testWithStatement31() throws Exception {
     doTest(LanguageLevel.PYTHON31);
   }