# Return the associated line with the location highlighted with color and a caret under the starting position
	# `color` must be and terminal escape sequence used as `"{escape}[{color}m;"`
	# * `"0;31"` for red
	# * `"1;31"` for bright red
	# * `"0;32"` for green
	fun colored_line(color: String): String
	do
		var esc = 27.code_point
		var def = "{esc}[0m"
		var col = "{esc}[{color}m"

		var l = self
		var i = l.line_start
		if i <= 0 then return ""

		var line_start = l.file.line_starts[i-1]
		var line_end = line_start
		var string = l.file.string
		while line_end+1 < string.length and string.chars[line_end+1] != '\n' and string.chars[line_end+1] != '\r' do
			line_end += 1
		end
		var lstart
		if l.column_start > 0 then
			lstart = string.substring(line_start, l.column_start - 1)
		else
			lstart = ""
		end
		var cend
		if i != l.line_end then
			cend = line_end - line_start + 1
		else
			cend = l.column_end
		end
		var lmid
		var lend
		if line_start + cend <= string.length then
			lmid = string.substring(line_start + l.column_start - 1, cend - l.column_start + 1)
			lend = string.substring(line_start + cend, line_end - line_start - cend + 1)
		else
			lmid = ""
			lend = ""
		end
		var indent = new FlatBuffer
		for j in [line_start..line_start+l.column_start-1[ do
			if string.chars[j] == '\t' then
				indent.add '\t'
			else
				indent.add ' '
			end
		end
		return "\t{lstart}{col}{lmid}{def}{lend}\n\t{indent}^"
	end