rename oopts to optk 'cause it clashes with an object later
rename oopts to optk 'cause it clashes with an object later

fboehm/labnotebook,fboehm/labnotebook,fboehm/labnotebook,fboehm/labnotebook,fboehm/cboettig_site,fboehm/labnotebook,fboehm/cboettig_site,antass/labnotebook3,fboehm/labnotebook,antass/labnotebook3,fboehm/cboettig_site,fboehm/cboettig_site,fboehm/cboettig_site,antass/labnotebook3