minor doc fix
minor doc fix

--HG--
extra : convert_revision : 04ec59ae1c1ba59edb8190d7af54108b1ebb7499

sonny-tarbouriech/ompl,utiasASRL/batch-informed-trees,florianhauer/ompl,sonny-tarbouriech/ompl,florianhauer/ompl,jvgomez/ompl,florianhauer/ompl,sonny-tarbouriech/ompl,davetcoleman/ompl,florianhauer/ompl,davetcoleman/ompl,davetcoleman/ompl,florianhauer/ompl,jvgomez/ompl,utiasASRL/batch-informed-trees,sonny-tarbouriech/ompl,davetcoleman/ompl,jvgomez/ompl,sonny-tarbouriech/ompl,sonny-tarbouriech/ompl,utiasASRL/batch-informed-trees,utiasASRL/batch-informed-trees,utiasASRL/batch-informed-trees,davetcoleman/ompl,davetcoleman/ompl,florianhauer/ompl,jvgomez/ompl,utiasASRL/batch-informed-trees,jvgomez/ompl,jvgomez/ompl