Breaking string into lines

I've got a function that breaks a string down into 'lines', so I can fit it into a defined space. However, I'm having trouble with the spaces:

--#note: minx/maxx/miny/maxy are coords defining the space
	local lines = { [1]=""}
	for word in text:gmatch( "%S+" ) do
		local oldLine = lines[ #lines ]
		lines[ #lines ] = lines[ #lines ] .. " " .. word
		if #lines[ #lines ] > maxx - minx then
			lines[ #lines ] = oldLine
			lines[ #lines + 1 ] = word
		end
	end

The above works, however the first line is offset by one space…

Below does not have the offset, however none of the words are spaced. (edit: actually, the first line is spaced. The rest are not)

	local lines = { [1]=""}
	for word in text:gmatch( "%S+" ) do
		local oldLine = lines[ #lines ]
		lines[ #lines ] = lines[ #lines ] .. word .. " "
		if #lines[ #lines ] > maxx - minx then
			lines[ #lines ] = oldLine
			lines[ #lines + 1 ] = word
		end
	end

It could be the fact that I'm using mimic, however I have not run into any similar issues with it.

Additionally, the code I use to render it is here, if that makes any difference:

		local l = self.miny
		for _, line in ipairs( self.lines ) do
			term.setCursorPos( self.minx, l )
			term.write( line )
			l = l + 1
		end

Change:

                       lines[ #lines + 1 ] = word

… to:

                       lines[ #lines + 1 ] = word .. " "