- remove stray AC_MSG_RESULT from DUMUX_CHECK_QUAD
- slight reformulations of the usage message of test_2p
- replace tabulators with four spaces
- remove trailing whitespaceformating

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@7620 2fb0f335-1f38-0410-981e-8018bf24f1b0