Remove trailing whitespace causing travis failure

meshcollider · meshcollider · commit 7b91b5f8a441 · 2017-11-16T08:23:03.000+13:00
diff --git a/src/undo.h b/src/undo.h
@@ -6,7 +6,7 @@
 #ifndef BITCOIN_UNDO_H
 #define BITCOIN_UNDO_H
 
-#include <compressor.h> 
+#include <compressor.h>
 #include <consensus/consensus.h>
 #include <primitives/transaction.h>
 #include <serialize.h>
