Latex documentation unicode characters problem

[gtato]

When generating the Latex documentation using:

sphinx-build -b latex -d _build/doctrees . _build/latex
make -C _build/latex all-pdf

pdflatex compiler complains about unicode characters which are not defined such as:
├ and└ (both used to describe the directory structure)

Please suggest which would be the way to solve this issue:

1. Remove those symbols
2. Use xelatex compiler which supports unicode (but generates other errors)
3. Define these symbols by means of DeclareUnicodeCharacter macros

[gtato]

I replaced both those characters with a │ just to have a compiling documentation but it doesn't look that good as before. Additionally, there is a problem with the coloured text in the documentation. In the rst file they are specified with the latex syntax however when it get translated to .tex sphinx messes up that part. For example:
If .rst has a line like:

\textcolor{red}{core}

In .tex that line would be:

\PYGZbs{}textcolor\PYGZob{}red\PYGZcb{}\PYGZob{}core\PYGZcb{}

and therefore won't be coloured.