Avoid page breaking right after start of example

[kopeckyf]

Install some \nopagebreak commands such that langsci-gb4e handles page breaking in a smart way, i.e. does not break after the first line of a (sub-)example env.

[kopeckyf]

It is actually pretty easy to do this using the newline command that prevents page breaks, or \\*.

Observe how the following leads to a page break:

\documentclass{article}
\usepackage{langsci-gb4e}
\usepackage{kantlipsum}
\begin{document}
\kant[7-9]

\ea  Kantian Philosophese\\
\gll As is evident upon close examination\\
     As is evident upon close examination\\
\glt `As is evident upon close examination'
\z
\end{document}

But using \\* in the \ea line prevents that:

\documentclass{article}
\usepackage{langsci-gb4e}
\usepackage{kantlipsum}
\begin{document}
\kant[7-9]

\ea  Kantian Philosophese\\*
\gll As is evident upon close examination\\
     As is evident upon close examination\\
\glt `As is evident upon close examination'
\z
\end{document}