cubicweb-comment #13810113 bad text wrapping of mardown comments in email notification [validation pending]

In particular, items of a list appear all on the same line.

prioritynormal
typebug
done in1.12.2
load left0.000
closed by#1b091601d6fd [entities] Use a reST-like content normalization for Markdown format
patch[entities] Use a reST-like content normalization for Markdown format [applied]