plotters.py: removed format=Latex which produced the angstrom error added tests
plotters.py: removed format=Latex which produced the angstrom error
added tests

pyspeckit/pyspeckit,jpinedaf/pyspeckit,allisony/pyspeckit,dinossimpson/pyspeckit,mikelum/pyspeckit,e-koch/pyspeckit,low-sky/pyspeckit,vlas-sokolov/pyspeckit,pyspeckit/pyspeckit,keflavich/pyspeckit,keflavich/pyspeckit,e-koch/pyspeckit,bsipocz/pyspeckit,vlas-sokolov/pyspeckit,mikelum/pyspeckit,allisony/pyspeckit,dinossimpson/pyspeckit,bsipocz/pyspeckit,low-sky/pyspeckit,jpinedaf/pyspeckit