[lltx] code style

[Will Robertson]

Hi,

Quick questions:

Why the obfuscation such as 

local splitpath, expandpath = file.split_path, kpse.expand_path
local gsub, match, rpadd    = string.gsub, string.match, string.rpadd

and so on? It makes the code typed shorter, yes, but I've found it harder to read because I haven't known the context of the functions. Is this a regular kind of thing in Lua programming?

Also, four spaces for indenting? Again, is this standard?

-- Will