preamble.tex

\usepackage{booktabs}
\usepackage{amsthm}
\makeatletter
\def\thm@space@setup{%
  \thm@preskip=8pt plus 2pt minus 4pt
  \thm@postskip=\thm@preskip
}
\makeatother

% Match code width in O'Reilly books
\setmonofont[Mapping=tex-ansi]{Inconsolata}
\usepackage{anyfontsize}
\DefineVerbatimEnvironment{Highlighting}{Verbatim}{commandchars=\\\{\},fontsize=\fontsize{10.5}{11}\selectfont}

% box drawing characters
% <https://tex.stackexchange.com/a/333210/6444>
\usepackage{newunicodechar}
\newfontfamily{\fallbackfont}{Andale Mono}
\DeclareTextFontCommand{\textfallback}{\fallbackfont}
\newunicodechar{█}{\textfallback{█}}
\newunicodechar{└}{\textfallback{└}}
\newunicodechar{─}{\textfallback{─}}
\newunicodechar{├}{\textfallback{├}}
\newunicodechar{│}{\textfallback{│}}