clang-format: [Java] Fix class declaration line breaks.

Before:
  @SomeAnnotation()
  abstract
      class aaaaaaaaa<a> extends bbbbbbbbbbbb<b> implements cccccccccccc {
  }

After:
  @SomeAnnotation()
  abstract class aaaaaaaaa<a> extends bbbbbbbbbbbb<b>
      implements cccccccccccc {
  }

llvm-svn: 221256

clang/lib/Format/TokenAnnotator.cpp

@@ -1862,6 +1862,10 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
         (Left.TokenText == "throws" || Left.TokenText == "extends" ||
          Left.TokenText == "implements"))
       return false;
+    if (Right.is(tok::identifier) &&
+        (Right.TokenText == "throws" || Right.TokenText == "extends" ||
+         Right.TokenText == "implements"))
+      return true;
   }
 
   if (Left.is(tok::at))

clang/unittests/Format/FormatTestJava.cpp

@@ -82,6 +82,11 @@ TEST_F(FormatTestJava, ClassDeclarations) {
                "    implements cccccccccccc {\n"
                "}",
                getStyleWithColumns(76));
+  verifyFormat("@SomeAnnotation()\n"
+               "abstract class aaaaaaaaa<a> extends bbbbbbbbbbbb<b>\n"
+               "    implements cccccccccccc {\n"
+               "}",
+               getStyleWithColumns(76));
 }
 
 TEST_F(FormatTestJava, EnumDeclarations) {