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> In my case I want less information. The default error string looks
> something like
> 
> 	[string "<code>"]:<line_number>: <error_message>

If you're loading Lua code with loadstring, use the optional second
argument to give an empty chunkname, as in
	loadstring("a(2)","=")
Then the error message will be
	:1: attempt to call global 'a' (a nil value)