Merge branch 'tpajero/improve-decparser' into 'Sim10'

Decparser: allow for python comments while decaying particles

See merge request !2036 (merged)

(cherry picked from commit 2de1b2f3)

2b2cd74c allow for python comments while decaying particles

Co-authored-by: Fernando Jesus Abudinen Gallego fernando.abudinen@cern.ch