Removed trailing whitespace from 2 comment lines.

common.lua

@@ -20,8 +20,8 @@ local digilines_enabled = minetest.get_modpath("digilines") ~= nil
 if digilines_enabled and pipeworks.use_default_digilines_rules then
 	pipeworks.digilines_rules=digiline.rules.default
 else
-	-- When using these rules, digiline signals are NOT conducted vertically, despite any rotation to the node. This 
-	-- breaks expected behavior with digiline conducting tubes. Some servers however, may have builds that relied on 
+	-- When using these rules, digiline signals are NOT conducted vertically, despite any rotation to the node. This
+	-- breaks expected behavior with digiline conducting tubes. Some servers however, may have builds that relied on
 	-- the lack of vertical conduction and may wish to revert to this behavior.
 	-- See https://github.com/mt-mods/pipeworks/issues/64
 	pipeworks.digilines_rules={{x=0,y=0,z=1},{x=0,y=0,z=-1},{x=1,y=0,z=0},{x=-1,y=0,z=0},{x=0,y=1,z=0},{x=0,y=-1,z=0}}