Fixed/added namespace ending comments using clang-tidy. NFC

The patch is generated using this command:

  $ tools/extra/clang-tidy/tool/run-clang-tidy.py -fix \
      -checks=-*,llvm-namespace-comment -header-filter='llvm/.*|clang/.*' \
      work/llvm/tools/clang

To reduce churn, not touching namespaces spanning less than 10 lines.

llvm-svn: 240270
diff --git a/clang/unittests/AST/EvaluateAsRValueTest.cpp b/clang/unittests/AST/EvaluateAsRValueTest.cpp
index 820edbc..f1d3eb5 100644
--- a/clang/unittests/AST/EvaluateAsRValueTest.cpp
+++ b/clang/unittests/AST/EvaluateAsRValueTest.cpp
@@ -79,7 +79,7 @@
     }
   };
 };
-}
+} // namespace
 
 TEST(EvaluateAsRValue, FailsGracefullyForUnknownTypes) {
   // This is a regression test; the AST library used to trigger assertion
diff --git a/clang/unittests/Basic/DiagnosticTest.cpp b/clang/unittests/Basic/DiagnosticTest.cpp
index fa2b56e..100fda4 100644
--- a/clang/unittests/Basic/DiagnosticTest.cpp
+++ b/clang/unittests/Basic/DiagnosticTest.cpp
@@ -46,4 +46,4 @@
   EXPECT_FALSE(Diags.hasUnrecoverableErrorOccurred());
 }
 
-}
+} // namespace
diff --git a/clang/unittests/Basic/SourceManagerTest.cpp b/clang/unittests/Basic/SourceManagerTest.cpp
index 494c27a..f087b69 100644
--- a/clang/unittests/Basic/SourceManagerTest.cpp
+++ b/clang/unittests/Basic/SourceManagerTest.cpp
@@ -271,7 +271,7 @@
   }
 };
 
-}
+} // namespace
 
 TEST_F(SourceManagerTest, isBeforeInTranslationUnitWithMacroInInclude) {
   const char *header =
diff --git a/clang/unittests/Basic/VirtualFileSystemTest.cpp b/clang/unittests/Basic/VirtualFileSystemTest.cpp
index 71d2d2b..fc3004e 100644
--- a/clang/unittests/Basic/VirtualFileSystemTest.cpp
+++ b/clang/unittests/Basic/VirtualFileSystemTest.cpp
@@ -279,7 +279,7 @@
   }
   operator StringRef() { return Path.str(); }
 };
-}
+} // namespace
 
 TEST(VirtualFileSystemTest, BasicRealFSIteration) {
   ScopedDir TestDirectory("virtual-file-system-test", /*Unique*/true);
diff --git a/clang/unittests/CodeGen/BufferSourceTest.cpp b/clang/unittests/CodeGen/BufferSourceTest.cpp
index b2a8ba5..00f0677 100644
--- a/clang/unittests/CodeGen/BufferSourceTest.cpp
+++ b/clang/unittests/CodeGen/BufferSourceTest.cpp
@@ -74,4 +74,4 @@
     clang::ParseAST(compiler.getSema(), false, false);
 }
 
-}
+} // namespace
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 15d62eb..715d0cb 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -893,5 +893,5 @@
   verifyFormat("var x: {[k: string]: v};");
 }
 
-} // end namespace tooling
+} // namespace format
 } // end namespace clang
diff --git a/clang/unittests/Format/FormatTestJava.cpp b/clang/unittests/Format/FormatTestJava.cpp
index 4c161e0..35b3b6c 100644
--- a/clang/unittests/Format/FormatTestJava.cpp
+++ b/clang/unittests/Format/FormatTestJava.cpp
@@ -501,5 +501,5 @@
                    "  void f() {}"));
 }
 
-} // end namespace tooling
+} // namespace format
 } // end namespace clang
diff --git a/clang/unittests/Format/FormatTestProto.cpp b/clang/unittests/Format/FormatTestProto.cpp
index ac8fcbd..e90c29f 100644
--- a/clang/unittests/Format/FormatTestProto.cpp
+++ b/clang/unittests/Format/FormatTestProto.cpp
@@ -152,5 +152,5 @@
                "};");
 }
 
-} // end namespace tooling
+} // namespace format
 } // end namespace clang
diff --git a/clang/unittests/Lex/PPCallbacksTest.cpp b/clang/unittests/Lex/PPCallbacksTest.cpp
index 94812fc..6ae71eb 100644
--- a/clang/unittests/Lex/PPCallbacksTest.cpp
+++ b/clang/unittests/Lex/PPCallbacksTest.cpp
@@ -346,4 +346,4 @@
   ASSERT_EQ(ExpectedState, Parameters.State);
 }
 
-} // anonoymous namespace
+} // namespace
diff --git a/clang/unittests/Tooling/RefactoringCallbacksTest.cpp b/clang/unittests/Tooling/RefactoringCallbacksTest.cpp
index c2b331c..ea4d8da 100644
--- a/clang/unittests/Tooling/RefactoringCallbacksTest.cpp
+++ b/clang/unittests/Tooling/RefactoringCallbacksTest.cpp
@@ -96,5 +96,5 @@
       Callback);
 }
 
-} // end namespace ast_matchers
+} // namespace tooling
 } // end namespace clang
diff --git a/clang/unittests/Tooling/TestVisitor.h b/clang/unittests/Tooling/TestVisitor.h
index f4a0039..77a42af 100644
--- a/clang/unittests/Tooling/TestVisitor.h
+++ b/clang/unittests/Tooling/TestVisitor.h
@@ -229,6 +229,6 @@
   std::vector<MatchCandidate> DisallowedMatches;
   std::vector<ExpectedMatch> ExpectedMatches;
 };
-}
+} // namespace clang
 
 #endif
diff --git a/clang/unittests/libclang/LibclangTest.cpp b/clang/unittests/libclang/LibclangTest.cpp
index e827ebc..650d28b 100644
--- a/clang/unittests/libclang/LibclangTest.cpp
+++ b/clang/unittests/libclang/LibclangTest.cpp
@@ -68,7 +68,7 @@
     clang_VirtualFileOverlay_dispose(VFO);
   }
 };
-}
+} // namespace
 
 TEST(libclang, VirtualFileOverlay_Basic) {
   const char *contents =