Fix invalid usage of create-space

Issue:http://rnd-github.huawei.com/paas/cli/issues/2

Before Fix: If cf user does
'cf create-space my-space blahablaha'
then its success

After Fix:If cf user does
'cf create-space my-space blahablaha'
then it will fail with proper reason
there is one more whitespace between "one" and "argument".