fix whitespace
diff --git a/tools/build_kvm.sh b/tools/build_kvm.sh
index 019b1bd..879de48 100755
--- a/tools/build_kvm.sh
+++ b/tools/build_kvm.sh
@@ -355,7 +355,7 @@
         kill $TAIL_PID
         exit 1
     }
- 
+
     # Let Ctrl-c kill tail and exit
     trap kill_tail SIGINT