Don't highlight Unicode literals in Python 3.3 as errors (PY-6703)

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

@@ -18,7 +18,8 @@ public enum LanguageLevel {
   PYTHON27(27, true, true, true, false),
   PYTHON30(30, true, false, false, true),
   PYTHON31(31, true, false, true, true),
-  PYTHON32(32, true, false, true, true);
+  PYTHON32(32, true, false, true, true),
+  PYTHON33(33, true, false, true, true);
 
   public static LanguageLevel getDefault() {
     return PYTHON26;
@@ -87,7 +88,10 @@ public enum LanguageLevel {
       if (pythonVersion.startsWith("3.1")) {
         return PYTHON31;
       }
-      return PYTHON32;
+      if (pythonVersion.startsWith("3.2")) {
+        return PYTHON32;
+      }
+      return PYTHON33;
     }
     return PYTHON24;
   }

python/src/com/jetbrains/python/validation/CompatibilityVisitor.java

@@ -218,7 +218,7 @@ public abstract class CompatibilityVisitor extends PyAnnotator {
     for (int i = 0; i != myVersionsToProcess.size(); ++i) {
       LanguageLevel languageLevel = myVersionsToProcess.get(i);
 
-      if (languageLevel.isPy3K()) {
+      if (languageLevel.isAtLeast(LanguageLevel.PYTHON30) && languageLevel.isOlderThan(LanguageLevel.PYTHON33)) {
         final String text = node.getText();
         if (text.startsWith("u") || text.startsWith("U")) {
           len = appendLanguageLevel(message, len, languageLevel);

python/testData/highlighting/unicode33.py

@@ -0,0 +1 @@
+print(u'text')

python/testSrc/com/jetbrains/python/PythonHighlightingTest.java

@@ -147,6 +147,11 @@ public class PythonHighlightingTest extends PyTestCase {
     doTest(LanguageLevel.PYTHON30, true, false);
   }
 
+  // PY-6703
+  public void testUnicode33() {
+    doTest(LanguageLevel.PYTHON33, true, false);
+  }
+
   public void testYieldInNestedFunction() {
     // highlight func declaration first, lest we get an "Extra fragment highlighted" error.
     EditorColorsManager manager = EditorColorsManager.getInstance();