A trailing white-space in the suggested-by string in r19298
put an error check in contribulyze.py to work and hence exit the script.
This fix accomodates such stray whitespaces, at the start, and at the end,
by striping them off before processing.

* tools/dev/contribulyze.py
  (Contributor.parse): Strip off leading/trailing whitespace, if any,
  from the name parameter.