Description of problem:
If you add a trailing blank line to the kickstart variables within the kickstart profile wizard, the last variable definition will contain this.

Version-Release number of selected component (if applicable):
5.3

How reproducible:
add a variable, e.g.:

redhat_management_server=myserver.mydomain.tld

and a trailing blank line.
  
Actual results:
defined variable will contain the blank line

Expected results:
blank lines should be ignored