[ObjC] Fix up clang-format directives in generate files.

- If the source name is long enough, clang-format can want to reflow that
  comment line, so move up the directive.
- Fix typo at the end of the file.

objectivec/GPBAny.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/any.proto
-
 // clang-format off
+// source: google/protobuf/any.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBAny.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/any.proto
-
 // clang-format off
+// source: google/protobuf/any.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBAny.pbobjc.h"
@@ -101,4 +100,4 @@ typedef struct GPBAny__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBApi.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/api.proto
-
 // clang-format off
+// source: google/protobuf/api.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBApi.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/api.proto
-
 // clang-format off
+// source: google/protobuf/api.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBApi.pbobjc.h"
@@ -355,4 +354,4 @@ typedef struct GPBMixin__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBDuration.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/duration.proto
-
 // clang-format off
+// source: google/protobuf/duration.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBDuration.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/duration.proto
-
 // clang-format off
+// source: google/protobuf/duration.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBDuration.pbobjc.h"
@@ -96,4 +95,4 @@ typedef struct GPBDuration__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBEmpty.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/empty.proto
-
 // clang-format off
+// source: google/protobuf/empty.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBEmpty.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/empty.proto
-
 // clang-format off
+// source: google/protobuf/empty.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBEmpty.pbobjc.h"
@@ -72,4 +71,4 @@ typedef struct GPBEmpty__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBFieldMask.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/field_mask.proto
-
 // clang-format off
+// source: google/protobuf/field_mask.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBFieldMask.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/field_mask.proto
-
 // clang-format off
+// source: google/protobuf/field_mask.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBFieldMask.pbobjc.h"
@@ -85,4 +84,4 @@ typedef struct GPBFieldMask__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBSourceContext.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/source_context.proto
-
 // clang-format off
+// source: google/protobuf/source_context.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBSourceContext.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/source_context.proto
-
 // clang-format off
+// source: google/protobuf/source_context.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBSourceContext.pbobjc.h"
@@ -85,4 +84,4 @@ typedef struct GPBSourceContext__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBStruct.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/struct.proto
-
 // clang-format off
+// source: google/protobuf/struct.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBStruct.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/struct.proto
-
 // clang-format off
+// source: google/protobuf/struct.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBStruct.pbobjc.h"
@@ -298,4 +297,4 @@ typedef struct GPBListValue__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBTimestamp.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/timestamp.proto
-
 // clang-format off
+// source: google/protobuf/timestamp.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBTimestamp.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/timestamp.proto
-
 // clang-format off
+// source: google/protobuf/timestamp.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBTimestamp.pbobjc.h"
@@ -96,4 +95,4 @@ typedef struct GPBTimestamp__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBType.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/type.proto
-
 // clang-format off
+// source: google/protobuf/type.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBType.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/type.proto
-
 // clang-format off
+// source: google/protobuf/type.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBType.pbobjc.h"
@@ -710,4 +709,4 @@ typedef struct GPBOption__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBWrappers.pbobjc.h

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/wrappers.proto
-
 // clang-format off
+// source: google/protobuf/wrappers.proto
 
 #import "GPBDescriptor.h"
 #import "GPBMessage.h"

objectivec/GPBWrappers.pbobjc.m

@@ -1,7 +1,6 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: google/protobuf/wrappers.proto
-
 // clang-format off
+// source: google/protobuf/wrappers.proto
 
 #import "GPBProtocolBuffers_RuntimeSupport.h"
 #import "GPBWrappers.pbobjc.h"
@@ -444,4 +443,4 @@ typedef struct GPBBytesValue__storage_ {
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

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

@@ -644,7 +644,7 @@ void FileGenerator::GenerateSource(io::Printer* printer) {
     "\n"
     "// @@protoc_insertion_point(global_scope)\n"
     "\n"
-    "// clange-format on\n");
+    "// clang-format on\n");
 }
 
 // Helper to print the import of the runtime support at the top of generated
@@ -655,9 +655,8 @@ void FileGenerator::PrintFileRuntimePreamble(
     const std::vector<std::string>& headers_to_import) const {
   printer->Print(
       "// Generated by the protocol buffer compiler.  DO NOT EDIT!\n"
-      "// source: $filename$\n"
-      "\n"
       "// clang-format off\n"
+      "// source: $filename$\n"
       "\n",
       "filename", file_->name());