Dt in seconds, minor fixes

input/input.lua

@@ -164,6 +164,7 @@ local axis_mt = {
 	clone = function(self)
 		return input.axis(unpack(self.detectors))
 		       :threshold(self.threshold)
+		       :triggeringThreshold(self.triggeringThreshold)
 	end,
 
 	--- Bind new AxisDetector(s) to this input.

signal/backend/love.lua

@@ -17,11 +17,11 @@ function signal.registerEvents()
 				local old = love[callback]
 				love[callback] = function(dt)
 					old(dt)
-					event:emit(callback, dt*1000)
+					event:emit(callback, dt)
 				end
 			else
 				love[callback] = function(dt)
-					event:emit(callback, dt*1000)
+					event:emit(callback, dt)
 				end
 			end
 		else

util/util.lua

@@ -140,6 +140,7 @@ util = {
 
 	--- Perform a deep copy of a table.
 	-- The copied table will keep the share the same metatable as the original table.
+	-- If a key is a table, it will be reused and not copied.
 	-- Note this uses pairs() to perform the copy, which will honor the __pairs methamethod if present.
 	-- @tparam table t the table
 	-- @treturn table the copied table