1   $ hg init

     2   $ touch a

     3 

     4   $ unset HGUSER

     5   $ echo "[ui]" >> .hg/hgrc

     6   $ echo "username= foo" >> .hg/hgrc

     7   $ echo "          bar1" >> .hg/hgrc

     8 

     9   $ hg ci -Am m

    10   adding a

    11   abort: username 'foo\nbar1' contains a newline

    12   

    13   $ rm .hg/hgrc

    14 

    15   $ HGUSER=`(echo foo; echo bar2)` hg ci -Am m

    16   abort: username 'foo\nbar2' contains a newline

    17   

    18   $ hg ci -Am m -u "`(echo foo; echo bar3)`"

    19   transaction abort!

    20   rollback completed

    21   abort: username 'foo\nbar3' contains a newline!

    22 

    23   $ true

    24