Would be good if there was a way to ignore whitespace around seperator characters when parsing an IEnumerable

**Issue by [ClerioVision](https://github.com/ClerioVision)**
_Monday Jul 24, 2017 at 13:41 GMT_
_Originally opened as https://github.com/gsscoder/commandline/issues/460_

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I'm using the following option class to parse a list of Enum values separated by ":' characters

so my command line might look like

prog -s NI:GALVO_CHILLER:OTS:A3200

would be nice if I could make it look like this (for better readability)

prog -s NI : GALVO_CHILLER : OTS : A3200

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Public Class CommandLineOptions

Public Enum SupressableDevices As Integer
NI
GALVO_CHILLER
LASER_CHILLER
DOCK_CAMERA
BACK_CAMERA
PLATFORM_SENSOR
OTS
LASER
A3200
End Enum

<[Option]("s"c, "Supress", Separator:=":"c, Required:=False, HelpText:="Devices to be supressed.")>
Public Property SupressedDevices As IEnumerable(Of SupressableDevices)

<[Option]("v"c, "verbose", HelpText:="Print details during execution")>
Public Property Verbose As Boolean

End Class