[SourceKit] Ignore the '__raw_doc_comment' attribute, which is more of an implementation detail.

test/SourceKit/DocumentStructure/structure.swift.placeholders.response

@@ -78,12 +78,7 @@
       key.length: 36,
       key.typename: "myArray",
       key.nameoffset: 229,
-      key.namelength: 7,
-      key.attributes: [
-        {
-          key.attribute: source.decl.attribute.__raw_doc_comment
-        }
-      ]
+      key.namelength: 7
     },
     {
       key.kind: source.lang.swift.expr.array,

test/SourceKit/DocumentStructure/structure.swift.response

@@ -381,11 +381,6 @@
       key.namelength: 11,
       key.bodyoffset: 654,
       key.bodylength: 186,
-      key.attributes: [
-        {
-          key.attribute: source.decl.attribute.__raw_doc_comment
-        }
-      ],
       key.substructure: [
         {
           key.kind: source.lang.swift.syntaxtype.comment.mark,
@@ -404,11 +399,6 @@
           key.namelength: 16,
           key.bodyoffset: 713,
           key.bodylength: 125,
-          key.attributes: [
-            {
-              key.attribute: source.decl.attribute.__raw_doc_comment
-            }
-          ],
           key.substructure: [
             {
               key.kind: source.lang.swift.decl.var.parameter,
@@ -552,12 +542,7 @@
       key.length: 15,
       key.typename: "Qtys",
       key.nameoffset: 1040,
-      key.namelength: 4,
-      key.attributes: [
-        {
-          key.attribute: source.decl.attribute.__raw_doc_comment
-        }
-      ]
+      key.namelength: 4
     },
     {
       key.kind: source.lang.swift.decl.function.free,
@@ -902,9 +887,6 @@
       key.attributes: [
         {
           key.attribute: source.decl.attribute.objc
-        },
-        {
-          key.attribute: source.decl.attribute.__raw_doc_comment
         }
       ],
       key.elements: [

test/SourceKit/DocumentStructure/structure_object_literals.swift.response

@@ -11,12 +11,7 @@
       key.length: 65,
       key.typename: "S",
       key.nameoffset: 148,
-      key.namelength: 5,
-      key.attributes: [
-        {
-          key.attribute: source.decl.attribute.__raw_doc_comment
-        }
-      ]
+      key.namelength: 5
     },
     {
       key.kind: source.lang.swift.expr.object_literal,

tools/SourceKit/lib/SwiftLang/SwiftLangSupport.cpp

@@ -656,6 +656,7 @@ std::vector<UIdent> SwiftLangSupport::UIDsFromDeclAttributes(const DeclAttribute
     case DAK_SetterAccessibility:
     // Ignore these.
     case DAK_ShowInInterface:
+    case DAK_RawDocComment:
       continue;
     default:
       break;