add test for --dc
added test for alternatives of --gain , i.e --change and -G
add alternative for --head , i.e --first
add tests for --detail and --rich-data
add test for --date expr
add test for alternative of tail, i.e last
add test for --immediate
add test for --time-report
add test for --time-colon
add test for --datetime-format
fixed --rich-data test
Fix minor whitespace issues
Define payees to get rid of trailing whitespace
Rename test since the equity command is being tested, not the option
add test for --equity