% Case 2 (x < 0): derp.
%
-% Used below to define pcases.
-\usepackage{enumitem}
+% Used below to define pcases. The ``loadonly'' parameter prevents
+% a very bad interaction with the beamer document class.
+\usepackage[loadonly]{enumitem}
% Needed to perform division in the definition of \singleblskip.
\usepackage{calc}
%
\newlength{\singleblskip}
\setlength{\singleblskip}{
- \baselineskip / \real{
+ \baselineskip/\real{
\if\relax\detokenize{\baselinestretch}\relax
\baselinestretch%
\else