ModulePrinting: Removing the comments that indicate an extension is synthesized; we will make the difference clear by using different syntax colors.

Author: nkcsgexi

lib/AST/ASTPrinter.cpp

@@ -1905,7 +1905,6 @@ static void printExtendedTypeName(Type ExtendedType, ASTPrinter &Printer,
 void PrintAST::
 printSynthesizedExtension(NominalTypeDecl* Decl, ExtensionDecl *ExtDecl) {
   if (Options.TransformContext->shouldOpenExtension) {
-    Printer << "// synthesized\n";
     printDocumentationComment(ExtDecl);
     printAttributes(ExtDecl);
     Printer << tok::kw_extension << " ";

test/IDE/print_synthesized_extensions.swift

@@ -123,30 +123,30 @@ public struct S10 : P1 {
   }
 }
 
-// CHECK: <synthesized>// synthesized
+// CHECK: <synthesized>
 // CHECK: extension <ref:Struct>S1</ref> where T : P2 {
 // CHECK:     <decl:Func>public func <loc>p2member()</loc></decl></synthesized>
 // CHECK: <synthesized>
 // CHECK:     <decl:Func>public func <loc>ef1(<decl:Param>t: T</decl>)</loc></decl>
 // CHECK:     <decl:Func>public func <loc>ef2(<decl:Param>t: <ref:Struct>S2</ref></decl>)</loc></decl>
 // CHECK: }</synthesized>
 
-// CHECK:  <synthesized>// synthesized
+// CHECK:  <synthesized>
 // CHECK: extension <ref:Struct>S1</ref> where T : P3 {
 // CHECK:     <decl:Func>public func <loc>p3Func(<decl:Param>i: <ref:Struct>Int</ref></decl>)</loc> -> <ref:Struct>Int</ref></decl>
 // CHECK: }</synthesized>
 
-// CHECK:  <synthesized>// synthesized
+// CHECK:  <synthesized>
 // CHECK: extension <ref:Struct>S1</ref> where T == Int {
 // CHECK:     <decl:Func>public func <loc>p1IntFunc(<decl:Param>i: <ref:Struct>Int</ref></decl>)</loc> -> <ref:Struct>Int</ref></decl>
 // CHECK: }</synthesized>
 
-// CHECK:  <synthesized>// synthesized
+// CHECK:  <synthesized>
 // CHECK: extension <ref:Struct>S1</ref> where T == S9<Int> {
 // CHECK:     <decl:Func>public func <loc>S9IntFunc()</loc></decl>
 // CHECK: }</synthesized>
 
-// CHECK:  <synthesized>// synthesized
+// CHECK:  <synthesized>
 // CHECK: extension <ref:Struct>S10</ref> {
 // CHECK:     <decl:Func>public func <loc>p3Func(<decl:Param>i: <ref:Struct>Int</ref></decl>)</loc> -> <ref:Struct>Int</ref></decl></synthesized>
 // CHECK: <synthesized>
@@ -155,19 +155,19 @@ public struct S10 : P1 {
 // CHECK:     <decl:Func>public func <loc>S9IntFunc()</loc></decl>
 // CHECK: }</synthesized>
 
-// CHECK:  <synthesized>// synthesized
+// CHECK:  <synthesized>
 // CHECK: extension <ref:Struct>S4</ref> {
 // CHECK:     <decl:Func>public func <loc>p1IntFunc(<decl:Param>i: <ref:Struct>Int</ref></decl>)</loc> -> <ref:Struct>Int</ref></decl>
 // CHECK: }</synthesized>
 
-// CHECK:  <synthesized>// synthesized
+// CHECK:  <synthesized>
 // CHECK: extension <ref:Struct>S6</ref> {
 // CHECK:     <decl:Func>public func <loc>p3Func(<decl:Param>i: <ref:Struct>Int</ref></decl>)</loc> -> <ref:Struct>Int</ref></decl></synthesized>
 // CHECK: <synthesized>
 // CHECK:     <decl:Func>public func <loc>ef5(<decl:Param>t: <ref:Struct>S5</ref></decl>)</loc></decl>
 // CHECK: }</synthesized>
 
-// CHECK:  <synthesized>// synthesized
+// CHECK:  <synthesized>
 // CHECK: extension <ref:module>print_synthesized_extensions</ref>.<ref:Struct>S7</ref>.<ref:Struct>S8</ref> {
 // CHECK:     <decl:Func>public func <loc>p3Func(<decl:Param>i: <ref:Struct>Int</ref></decl>)</loc> -> <ref:Struct>Int</ref></decl></synthesized>
 // CHECK: <synthesized>