initlatex: current_dir flag still requires directory argument

[maxschalz]

If using initlatex with the --current_dir flag, it should be obsolete to enter a directory name. This is not the case at the moment and to fix it, one should combine/restructure the following lines (probably):

scripts/scripts/init_latex.py

Lines 58 to 66 in d61afea

	dirname = ("Name of the directory in which the LaTeX files will be"
	+ " generated into.")
	parser.add_argument("dirname", metavar="directory name", type=str,
	help=dirname)
	current_dir = ("If this flag is set, the files are generated into "
	"the current working directory.")
	parser.add_argument("--current_dir", action="store_true",
	help=current_dir)

Issue pointed out by @jung-benjamin.