Ensure make doc fails on warnings and/or errors. (#920)

Author: janiversen

.github/workflows/ci.yml

@@ -197,6 +197,7 @@ jobs:
             # continue_on_error: true
           - name: Docs
             tox: docs
+            # continue_on_error: true
         os:
           - name: Linux
             runs-on: ubuntu-latest

doc/Makefile

@@ -2,7 +2,7 @@
 #
 
 # You can set these variables from the command line.
-SPHINXOPTS    =
+SPHINXOPTS    = -W --keep-going
 SPHINXBUILD   = sphinx-build
 SPHINXPROJ    = PyModbus
 SOURCEDIR     = .
@@ -17,4 +17,4 @@ help:
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
-	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

doc/source/library/pymodbus.client.asynchronous.async_io.rst

@@ -1,5 +1,5 @@
 pymodbus\.client\.asynchronous\.async_io package
-===============================================
+================================================
 
 .. automodule:: pymodbus.client.asynchronous.async_io
     :members:

doc/source/library/pymodbus.internal.rst

@@ -15,7 +15,6 @@ Subpackages
     pymodbus.constants
     pymodbus.datastore
     pymodbus.framer
-    pymodbus.internal
     pymodbus.server
     pymodbus.repl