Lua lexer classifies keywords as identifiers

[kedorlaomer]

Using lpeg 1.0.1-1 and lua 5.3.3, I find that

 for kind, text in lxsh.lexers.lua.gmatch 
   'sleep(5); if x >= 0 then print(x) else print(-x) end' do 
    print(kind, text)
end

outputs

identifier      sleep
operator        (
number  5
operator        )
operator        ;
whitespace
identifier      if
whitespace
identifier      x
whitespace
operator        >=
whitespace
number  0
whitespace
identifier      then
whitespace
identifier      print
operator        (
identifier      x
operator        )
whitespace
identifier      else
whitespace
identifier      print
operator        (
operator        -
identifier      x
operator        )
whitespace
identifier      end

It considers all keywords to be identifiers. Only if a keyword is the first token of the string it gets the kind classifier.