gretl-doc 2020c-2 (amd64 binary) in ubuntu groovy

 The GNU Regression, Econometric and Time-Series Library (gretl) is a
 software package for econometric analysis. The package comprises a
 shared library, a command-line client program, and a graphical client
 built using GTK+.
 .
 This package provides documentation and examples included in the gretl
 sources.