\setupbodyfont[dejavu,10pt]

\definetextbackground[b]

\setupwhitespace[big]

\starttext

test
\starttextbackground[b] test test \stoptextbackground
test

test
\starttextbackground[b] test test \par \stoptextbackground
test

test
\starttextbackground[b] \par test test \stoptextbackground
test

test
\starttextbackground[b] \par test test \par \stoptextbackground
test

test
\starttextbackground[b] \par test \par test \par \stoptextbackground
test

\stoptext
