Index: lib/Format/ContinuationIndenter.cpp
===================================================================
--- lib/Format/ContinuationIndenter.cpp
+++ lib/Format/ContinuationIndenter.cpp
@@ -731,7 +731,10 @@
   if (NextNonComment->is(TT_TemplateString) && NextNonComment->closesScope())
     return State.Stack[State.Stack.size() - 2].LastSpace;
   if (Current.is(tok::identifier) && Current.Next &&
-      Current.Next->is(TT_DictLiteral))
+      (Current.Next->is(TT_DictLiteral) ||
+       ((Style.Language == FormatStyle::LK_Proto ||
+         Style.Language == FormatStyle::LK_TextProto) &&
+        Current.Next->is(TT_TemplateOpener))))
     return State.Stack.back().Indent;
   if (NextNonComment->is(TT_ObjCStringLiteral) &&
       State.StartOfStringLiteral != 0)
Index: unittests/Format/FormatTestProto.cpp
===================================================================
--- unittests/Format/FormatTestProto.cpp
+++ unittests/Format/FormatTestProto.cpp
@@ -356,6 +356,12 @@
                "  }\n"
                "  field_g: OK\n"
                ">;");
+
+  verifyFormat("option (MyProto.options) = <\n"
+               "  app_id: 'com.javax.swing.salsa.latino'\n"
+               "  head_id: 1\n"
+               "  data <key: value>\n"
+               ">;");
 }
 
 TEST_F(FormatTestProto, FormatsService) {
Index: unittests/Format/FormatTestTextProto.cpp
===================================================================
--- unittests/Format/FormatTestTextProto.cpp
+++ unittests/Format/FormatTestTextProto.cpp
@@ -245,6 +245,10 @@
                ">\n"
                "field: OK,\n"
                "field_c <field <field <>>>");
+
+  verifyFormat("app_id: 'com.javax.swing.salsa.latino'\n"
+               "head_id: 1\n"
+               "data <key: value>");
 }
 } // end namespace tooling
 } // end namespace clang