Use \raggedright for headings in PDF to avoid awkward spacing

preamble.tex.txt

@@ -49,6 +49,9 @@
   \geometry{paperwidth=\dimexpr\trimwidth-\gutteradd\relax,paperheight=\trimheight,margin=\stdmargin,bottom=\dimexpr\stdmargin+\bottomadd\relax} % Deduct 4mm from width to account for gutter
 \fi
 
+% Heading style
+\titleformat{\section}{\Large\raggedright\py@HeaderFamily}{\py@TitleColor\thesection}{0.5em}{\py@TitleColor}{\py@NormalColor} % Add \raggedright
+
 % Footnote style
 \usepackage[hang,bottom]{footmisc}
 \setlength{\footnotemargin}{0.4cm}