Merge topic 'SystemTools-CopyFileIfDifferent-no-dir'

c2420a42

 SystemTools: Revert "CopyFileIfDifferent: Ensure that source is a file"
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !165

SystemTools.cxx

@@ -2182,10 +2182,6 @@ static std::string FileInDir(const std::string& source, const std::string& dir)
 bool SystemTools::CopyFileIfDifferent(const std::string& source,
                                       const std::string& destination)
 {
-  if (SystemTools::FileIsDirectory(source)) {
-    return false;
-  }
-
   // special check for a destination that is a directory
   // FilesDiffer does not handle file to directory compare
   if (SystemTools::FileIsDirectory(destination)) {