diff --git a/clang/lib/Frontend/FrontendAction.cpp b/clang/lib/Frontend/FrontendAction.cpp
index a592942..74550c4 100644
--- a/clang/lib/Frontend/FrontendAction.cpp
+++ b/clang/lib/Frontend/FrontendAction.cpp
@@ -288,7 +288,7 @@
     Includes += "}\n";
 }
 
-/// Collect the set of header includes needed to construct the given 
+/// Collect the set of header includes needed to construct the given
 /// module and update the TopHeaders file set of the module.
 ///
 /// \param Module The module we're collecting includes from.
@@ -345,7 +345,7 @@
     vfs::FileSystem &FS = *FileMgr.getVirtualFileSystem();
     for (vfs::recursive_directory_iterator Dir(FS, DirNative, EC), End;
          Dir != End && !EC; Dir.increment(EC)) {
-      // Check whether this entry has an extension typically associated with 
+      // Check whether this entry has an extension typically associated with
       // headers.
       if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->getName()))
           .Cases(".h", ".H", ".hh", ".hpp", true)
@@ -358,7 +358,7 @@
       if (!Header)
         continue;
 
-      // If this header is marked 'unavailable' in this module, don't include 
+      // If this header is marked 'unavailable' in this module, don't include
       // it.
       if (ModMap.isHeaderUnavailableInModule(Header, Module))
         continue;
@@ -431,7 +431,7 @@
     CI.getDiagnostics().Report(diag::err_missing_module_name);
 
     // FIXME: Eventually, we could consider asking whether there was just
-    // a single module described in the module map, and use that as a 
+    // a single module described in the module map, and use that as a
     // default. Then it would be fairly trivial to just "compile" a module
     // map with a single module (the common case).
     return nullptr;