Fixed up markup

README.md

 translations of it, one pair per line.  Sweet.  Also supports other languages
 (about 10 in total).
 
-Most useful options are --lines (default is 25), --long, as shorthand
-to --lines=50, and --direction, which supports direction keyword in form
+Most useful options are `--lines` (default is 25), `--long`, as shorthand
+to `--lines=50`, and `--direction`, which supports direction keyword in form
 "LNcz.cz" or "LNcz.LN", where LN is 2-letter code (**not** ISO) of the other
 language.