also fix the key export in the long example

tsa/howto/create-a-new-user.mdwn

@@ -54,13 +54,13 @@ For example, your laptop.
          FINGERPRINT=0123456789ABCDEF0123456789ABCDEF01234567
         NEW_USER=alice
         REQUESTOR=bob
-        gpg --export-options export-minimal --no-armor --export "$FINGERPRINT" > "${NEW_USER}-${FINGERPRINT}.gpg"
-        git add "${NEW_USER}-${FINGERPRINT}.gpg"
+        ./NEW "$NEW_USER" "$FINGERPRINT" && 
+        git add "${NEW_USER}-${FINGERPRINT}.gpg" &&
         git commit -m"new user ${NEW_USER} requested by ${REQUESTOR}"
 
   3. push to both repositories:
   
-         git push
+         git push &&
         git push alberti
 
 ## on the LDAP server