Fixing font spec so code compiles on macOS without any additional system fonts needing to be installed.

src/SNOUG.tex

@@ -71,14 +71,19 @@ leftmargin=1cm,rightmargin=1cm
 % http://mirrors.ctan.org/macros/latex/contrib/fontspec/fontspec.pdf
 \usepackage{fontspec}
 \defaultfontfeatures{Ligatures=TeX} % To support LaTeX quoting style
+\defaultfontfeatures{Path=fonts/} % Specify the location of font files
 % To get font name, run, for example:
 % otfinfo -i `kpsewhich lmroman12-regular.otf` | grep "^Full name:"
 % STIX
 \setmainfont[Ligatures=TeX]{STIXGeneral-Regular}
 % Latin Modern
-\setmonofont{LMMono12-Regular}
+\setmonofont{LMMono12-Regular.otf}
 % Linux Biolinum
-\setsansfont[Ligatures=TeX]{Linux Biolinum O}
+\setsansfont{LinBiolinum}[ % Linux Biolinum
+	UprightFont=*_R.otf,
+	BoldFont=*_RB.otf,
+	ItalicFont=*_RI.otf
+]
 
 %%% END PREAMBLE FONTS %%%