[ObjC] Small formatting tweaks.

Hopefully will make future edits a little easier.

clang-format doesn't do anything with `R"objc(` blocks, and we can't use `R"cc(`
blocks as that gets the ObjC code formatted wrong.

PiperOrigin-RevId: 608678538

src/google/protobuf/compiler/objectivec/field.cc

@@ -300,9 +300,9 @@ void SingleFieldGenerator::GeneratePropertyDeclaration(
                                        descriptor_);
                   }}},
                 R"objc(
-        $comments$
-        @property(nonatomic, readwrite) $property_type$$name$$ deprecated_attribute$;
-      )objc");
+                  $comments$
+                  @property(nonatomic, readwrite) $property_type$$name$$ deprecated_attribute$;
+                )objc");
   if (WantsHasProperty()) {
     printer->Emit(R"objc(
       @property(nonatomic, readwrite) BOOL has$capitalized_name$$ deprecated_attribute$;
@@ -358,9 +358,9 @@ void ObjCObjFieldGenerator::GeneratePropertyDeclaration(
                                        descriptor_);
                   }}},
                 R"objc(
-        $comments$
-        @property(nonatomic, readwrite, $property_storage_attribute$, null_resettable) $property_type$$name$$storage_attribute$$ deprecated_attribute$;
-      )objc");
+                  $comments$
+                  @property(nonatomic, readwrite, $property_storage_attribute$, null_resettable) $property_type$$name$$storage_attribute$$ deprecated_attribute$;
+                )objc");
   if (WantsHasProperty()) {
     printer->Emit(R"objc(
         /** Test to see if @c $name$ has been set. */

src/google/protobuf/compiler/objectivec/oneof.cc

@@ -70,9 +70,9 @@ void OneofGenerator::GeneratePublicCasePropertyDeclaration(
                                        descriptor_);
                   }}},
                 R"objc(
-        $comments$;
-        @property(nonatomic, readonly) $enum_name$ $name$OneOfCase;
-      )objc");
+                  $comments$;
+                  @property(nonatomic, readonly) $enum_name$ $name$OneOfCase;
+                )objc");
   printer->Emit("\n");
 }