Completion: lualatex ≠ pdflatex and xelatex

[Denis Bitouzé <dbitouze@xxxxxxxxxx>]

Hi,

  ┌────
  │ Context:
  │ 
  │ - Mageia 8 GNU/Linux box,
  │ - Vanilla TeX Live installation,
  │ - zsh 5.8.1 (x86_64-mageia-linux-gnu)
  └────

The completion behaves differently:

- in one hand for `pdflatex` and `xelatex`,
- in the other hand for `lualatex`.

Namely, for a (single) `test.tex` file (with several `test.*` auxiliary
files) in the current directory:

1. `pdflatex tes + TAB` is completed into `pdflatex test.tex`,
2. `xelatex tes + TAB` is completed into `xelatex test.tex`
3. `lualatex tes + TAB` is completed into `lualatex test.`, and
   `lualatex test. + TAB` proposes all the `test.*` files present in the
   current directory.

Maybe this has to do with the absence of `lualatex` in the line:

  ┌────
  │ #compdef tex latex slitex pdftex pdflatex jadetex pdfjadetex xetex=tex xelatex=latex latexmk
  └────

in /usr/share/zsh/5.8.1/functions/Completion/Unix/_tex.

How to make completion with `lualatex` behave as with `pdflatex` and `xelatex`?

Thanks.
-- 
Denis