Backticks are not displayed when using pdfLaTeX.#4

When I render some code with the listings environment, the backtick is not displayed: ```latex \begin{lstlisting} expecting backtick here ->`<- \end{lstlisting} ``` The resulting PDF has no backtick in it. <img width="550" alt="screenshot 2017-11-16 16 24 04" src="https://user-images.githubusercontent.com/17237627/32899233-b1a369b6-caea-11e7-8fcb-54990904ba45.png"> The LaTeX error message I get is: ``` [WARNING] Missing character: There is no ` in font SourceCodePro-Regular-tlf-ts1! ``` --- I [included the package without any options](https://github.com/Wandmalfarbe/pandoc-latex-template/blob/master/eisvogel.tex#L489): ```latex \usepackage{sourcecodepro} ``` and [modified the listing environment](https://github.com/Wandmalfarbe/pandoc-latex-template/blob/master/eisvogel.tex#L556): ```latex \lstdefinestyle{eisvogel_listing_style}{ basicstyle = \color{listing-text-color}\small\ttfamily{}\linespread{1.15}, ... } \lstset{style=eisvogel_listing_style} ``` --- See the original issue [here](https://github.com/Wandmalfarbe/pandoc-latex-template/issues/21).