Line spacing in todo notes

You may want line spacing in your todo notes different from line spacing of the other text.
In documentation for todonotes it’s recommended to use this command:

\newcommand{\smalltodo}[2][]
    {\todo[caption={#2}, #1]
    {\begin{spacing}{0.5}#2\end{spacing}}}

But extra blank line is appended to the end of every todonote.

Another way to do the same thing (without spacing environment from setspace package):

\newcommand{\tinytodo}[2][]
{\todo[caption={#2}, #1]{\renewcommand{\baselinestretch}{0.5}\selectfont#2\par}}

And for me, it works!