use layout() where appropriate and cleanup

sys/modules/opus/fuzzy.lua

@@ -0,0 +1,19 @@
+-- Based on Squid's fuzzy search
+-- https://github.com/SquidDev-CC/artist/blob/vnext/artist/lib/match.lua
+--
+-- not very fuzzy anymore
+
+local SCORE_WEIGHT               = 1000
+local LEADING_LETTER_PENALTY     = -3
+local LEADING_LETTER_PENALTY_MAX = -9
+
+local _find = string.find
+local _max  = math.max
+
+return function(str, pattern)
+	local start = _find(str, pattern, 1, true)
+	if start then
+		-- All letters before the current one are considered leading, so add them to our penalty
+		return SCORE_WEIGHT + _max(LEADING_LETTER_PENALTY * (start - 1), LEADING_LETTER_PENALTY_MAX)
+	end
+end