Add missing space between error and exit code (#4696)
Add missing space between error and exit code (#4696)

Fixes current output of `"Command terminated with non-zero exit code1"` to `"Command terminated with non-zero exit code 1"`

Co-authored-by: Bryan Kendall <aee22ddf77d91edcd2a29133709a167f3a4e804e@google.com>
firebase/firebase-tools,firebase/firebase-tools,firebase/firebase-tools,firebase/firebase-tools,firebase/firebase-tools