.readthedocs.yml: add directive for RTD to build a pdf version of the docs

sommersoft · sommersoft · commit 97415fc604f7 · 2020-08-15T14:30:12.000-05:00
diff --git a/.readthedocs.yml b/.readthedocs.yml
@@ -12,6 +12,9 @@ submodules:
     include:
         - extmod/ulab
 
+formats:
+  - pdf
+
 python:
     version: 3
     install:
