Custom Block Palette: inconsistent behavior about multi-line snippets #230

I was working on an online version of pencil cards, and wanted to have some multi-line snippets like:
"""
rt 45
fd 70
rt 90
fd """ (except I used \n for actual newlines and it wasn't a multiline string, i.e.: 'rt 45\nfd 70\nrt 90\nfd')

But inside the palette, only the first line shows up. I was confused, since I know there are multi-line snippets present in the regular palette. Experimentation suggests:

1. Multi-line snippets are preserved if they represent a container statement, e.g. if, forever, functions, etc.
2. Comments are stripped out even within those (I wanted comments like "# put useful stuff here"

Is there a way to make Pencil Code preserve my multi-line block snippets the way I want them?