Mod translation updater: S"Hello"-type calls aren't picked up

[rollerozxa]

Summary

Say you have some code like this:

minetest.chat_send_all(S"Hello")

Omitting the brackets when there is only a single string argument is valid in Lua and is used in mods like i3, but the translation updater doesn't pick up on this.

Steps to reproduce

Run the script on the above code put in a lua file and try to generate locale with the tool.

[appgurueu]

Labeling this as a feature request because strictly speaking the script is "correct" in that it should handle the forms it claims to pick up correctly. Supporting another form (aside with S'...' for consistency? and perhaps S[[...]], possibly with equals signs) is a sensible feature request which I support however - I personally like to use this syntactic sugar.

This should also be easy enough to implement by adapting the regex.