Fixed stupid possible bug in utils.lua. (Forgot a local keyword in copy_line.)

Finally wrote some documentation for karaskel.lua and karaskel-adv.lua.

Originally committed to SVN as r28.

automation/include/karaskel-adv.lua

@@ -33,8 +33,6 @@
 
 -- It automatically includes and re-setups karaskel.lua, so you should not include that yourself!
 include("karaskel.lua")
--- Also include utils.lua, since you'll most likely need to use the copy_line function
-include("utils.lua")
 
 -- The interface here has been greatly simplified, there is only one function to override, do_syllable
 -- The format for that one has changed.

automation/include/karaskel.lua

@@ -65,6 +65,8 @@
 --   start_time - Start time of the syllable, in miliseconds, relative to the start of the line
 --   end_time - End time of the syllable, similar to start_time
 
+-- Since utils.lua is always useful, include it here
+include("utils.lua")
 
 -- This one is used
 aegisub.output_warning = aegisub.output_debug

automation/include/utils.lua

@@ -30,7 +30,7 @@
 -- Variables with tables only hold references to the actual tables
 -- Since a line is a table, a line needs to be copied, otherwise things break in bad ways
 function copy_line(input)
-	output = {}
+	local output = {}
 	output.kind = input.kind
 	if input.kind == "scomment" then
 		output.text = input.text