Changes

<cd:notes>

<cd:note author="Benjamin" date="2021-08-02T20:37:54+0200">

To test if a (potentially empty) buffer exists: `\doifelsebuffer{buffername}{yes}{no}`

To test if a buffer has content (more than blank lines): `\doiftextelse{\getbuffer[buffername]}{yes}{no}`

</cd:note></cd:notes>

<cd:seealso>

<cd:commandref name="_startbuffer"></cd:commandref>

<cd:commandref name="definebuffer"></cd:commandref>

</cd:commandgroup>