pandoc: improve desc, add 2 examples (#1072)
pandoc: improve desc, add 2 examples (#1072)

The list of supported formats needs to be done this way until https://github.com/jgm/pandoc/issues/2685 is resolved.

Also expand the --to option, to avoid ambiguity (per PR review)

cptdeka10/tldr,UncommonPleb/tldr,deekim/tldr,katekyan/tldr,Phizho/tldr,zoisom/tldr,felixonmars/tldr,katekyan/tldr,katekyan/tldr,slash3b/tldr,felixonmars/tldr,deekim/tldr,zoisom/tldr,deekim/tldr,UncommonPleb/tldr,Phizho/tldr,UncommonPleb/tldr,cptdeka10/tldr,slash3b/tldr,zoisom/tldr,cptdeka10/tldr,Phizho/tldr,slash3b/tldr,felixonmars/tldr