Reverting not allowing spaces inside username (2.5.x)
Preventing space at beginning or end of the username. Changing lang
string to fit.
oops
 	Preventing saving spaces at beginning and end of username for
Superadmin when installing Joomla
Merge pull request #2644 from infograf768/32883-25x

# Reverting not allowing spaces inside username (2.5.x)