fix: change PDF builder for correct handling of Russian (deeppavlov#627)

* Change PDF builder for correct handling of Russian * Revert PDF building on RTD
molodiuc · Dec 4, 2018 · fe573f8 · fe573f8
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commit fe573f8
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diff --git a/.readthedocs.yml b/.readthedocs.yml
@@ -3,8 +3,7 @@
 build:
   image: latest
 
-formats:
-  - pdf
+formats: []
 
 python:
   pip_install: true

diff --git a/docs/conf.py b/docs/conf.py
@@ -130,6 +130,8 @@
 
 # -- Options for LaTeX output ------------------------------------------------
 
+latex_engine = 'xelatex'
+
 latex_elements = {
     # The paper size ('letterpaper' or 'a4paper').
     #