Clean up extra spaces

Although these errors are not important, they affect the code specification.

Change-Id: I1f91dba079ecf60b1d4b57123048d8409476dde0

tools/with_venv.sh

@@ -4,7 +4,7 @@ command -v tox > /dev/null 2>&1
 if [ $? -ne 0 ]; then
   echo 'This script requires "tox" to run.'
   echo 'You can install it with "pip install tox".'
-  exit 1; 
+  exit 1;
 fi
 
 tox -evenv -- $@