Test for autocommand that redefines the argument list, when doing ":all". STARTTEST:so small.vim:au BufReadPost Xxx2 next Xxx2 Xxx1/^start ofA1:.,/end of/w! Xxx1    " write test file Xxx1$r2:.,/end of/w! Xxx2     " write test file Xxx2$r3:.,/end of/w! Xxx3     " write test file Xxx3:next! Xxx1 Xxx2 Xxx3     " redefine arglist; go to Xxx1:all                      " open window for all args:w! test.out              " Write contents of Xxx1:w >>test.out     " Append contents of last window (Xxx1):rew                      " should now be in Xxx2:w >>test.out             " Append contents of Xxx2:qa!ENDTEST start of test file Xxx	this is a test	this is a test	this is a test	this is a testend of test file Xxx