missing space in [] test

fixing #10

Author: Motorrat

git-identity

@@ -292,7 +292,7 @@ define_ssh () {
  fi
 
  local current_identity="$(git config user.identity)"
- if [ "$current_identity" == "$identity"]
+ if [ "$current_identity" == "$identity" ]
  then 
  use_identity "$identity"
  fi