Don't open title page input file in binary mode in PrintingService #1150
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PrintingServicecurrently doesn't work. When someone uses it to print something, the compilation of (or rather the rendering of the template of) the title page will fail. As far as I can tell, the reason for this comes from the transition from Tornado to Jinja2:Jinja2 templates render to strings (unlike the previously used Tornado templates, which render to bytes). So we shouldn't open the output file in binary mode.
This change is