newline at end of newcommand [duplicate]

Question

I have a newcommand defining a special paragraph (it's for a cheatsheet document):

\newcommand{\command}[2]{#1~\dotfill{}~#2\\}

I'm using it in the document in the following way:

\command{A}{Desc A}
\command{B}{Desc B}
\command{C}{Desc C}

Other section of my doc.

This code generates me a warning on line with \command{C}:

Underfull \hbox (badness 10000) in paragraph at lines <n>--<m>

I understand it's because this line is followed by a blank line.

So one solution I found to avoid this warning is to change my definition to:

\newcommand{\command}[2]{#1~\dotfill{}~#2}

(without the new line). And use it the following way:

\command{A}{Desc A}\\
\command{B}{Desc B}\\
\command{C}{Desc C}

Other section of my doc.

But I find it's not super clean, is it a way to do it automatically?

In fact, I want \command to act like a paragraph.