Effect: search index is not created

Identified trouble causer:

https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/data_system/linked_libraries.rst
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/editors/3dview/object/relationships/parents.rst
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/modeling/meshes/vertex_groups/vertex_groups.rst
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/render/freestyle/python.rst
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/troubleshooting/python.rst
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/animation/drivers.rst
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/rigging/armatures/editing/bones.rst
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/render/output/output.rst
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/advanced/command_line/ 2 files
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/advanced/scripting/python/ 2 files
https://developer.blender.org/diffusion/BM/browse/trunk/blender_docs/manual/about/contribute/ all subfolders