[sword-devel] imp2vs -r command line flag missing usage description

[Jaak Ristioja]

Hello!

SVN 3567 with commit message "added new option to imp2vs to allow
augmenting a module but replacing entries (-r) instead of appending to
end of existing entries" implemented the command line flag -r, but did
not introduce a description of this flag in the usage() function.

Please add the description as well! :)

With thanks,
J