Thanks @Raphaël Peguet
You are correct , New line will be added if . [full stop] is there.
In our requirement we do need fullstop prefix value.
0.xxxx
here we didn't accept new line after dot.
If we use space or -[minus] after .[full stop] , will not get the space issue.
Only issue with .[full stop] + no space after full stop. will create extra space @ bottom of textfield.