Whitespace cleanup

samples/xmpsample.cpp

@@ -184,7 +184,7 @@ try {
     // -------------------------------------------------------------------------
     // Output XMP properties
     for (Exiv2::XmpData::const_iterator md = xmpData.begin();
-         md != xmpData.end(); ++md) {
+        md != xmpData.end(); ++md) {
         std::cout << std::setfill(' ') << std::left
                   << std::setw(44)
                   << md->key() << " "