How can I remove punctuation/period after lettered subexamples in g4be/xlist

Question

I have to change sub examples in xlist environments (or rather g4be's \ea \ea \ex \ex \ex \z \z ) from being letter plus period, e.g. a. to simple parentheses (a) not followed by a period/full stop.

I have managed to get the parentheses using \renewcommand\thexnumii{(\alph{xnumii})} but I cannot remove the period so I have:

\ea
\ea blah blah blah
\ex blah blah blah
\z
\z

which gives me
(1)  (a). blah blah blah
  (b). blah blah blah

But I need the following:

(1)  (a) blah blah blah
  (b) blah blah blah

Do anyone have any idea how to do it? I've played with renewing xlista and xlisti but without luck; I'm probably missing something obvious or doing it wrong. Thanks.

Peace!

Answer 1

This removes the . from only the level 2 subexamples, but not from more deeply embedded ones. I'm using the intended standard syntax, but the example works with the shorthands too.

\documentclass{article}
\usepackage{etoolbox}
\usepackage{gb4e}
\makeatletter
\patchcmd{\@xlist}{.}{\ifnum \@xnumdepth =2{}\else{.}\fi}{}{}
\renewcommand\thexnumii{(\@xsii{xnumii})}
\makeatother

\begin{document}
\begin{exe}
\ex
\begin{xlist}
\ex An example.
\begin{xlist}
\ex An embedded example.
\ex Another embedded example.
\end{xlist}
\ex Another example.
\end{xlist}
\end{exe}
\end{document}