I'm trying to split a line on whitespace and then not whitspace, but I don't want to lose any of the whitespace. As an example, given the first line of df (I've replaces spaces with '_' to make it more obvious what I need: 
Filesystem___________1K-blocks______Used_Available_Use%_Mounted_on

[download]
I want (split parts denoted by []s): 
[Filesystem][___________1K-blocks][______Used][_Available][_Use%][_Mou
+nted][_on]

[download]
I almost have what I want with split(/(?<=\S)(\s)/); but I get this: 
[Filesystem][_][__________1K-blocks][_][_____Used][_][Available][_][Us
+e%][_][Mounted][_][on]

[download]
Any advice?

In reply to Splitting without losing by anjiro

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