Merge pull request #5970 from tk0miya/separate_devhelp

Separate devhelp to sphinxcontrib package

doc/extdev/index.rst

@@ -275,6 +275,11 @@ The following is a list of deprecated interfaces.
      - 4.0
      - ``docutils.nodes.abbreviation``
 
+   * - ``sphinx.builders.devhelp``
+     - 2.0
+     - 4.0
+     - ``sphinxcontrib.devhelp``
+
    * - ``sphinx.builders.epub3.Epub3Builder.validate_config_value()``
      - 2.0
      - 4.0

doc/usage/builders/index.rst

@@ -117,7 +117,7 @@ The builder's "name" must be given to the **-b** command-line option of
 
    .. versionadded:: 1.3
 
-.. module:: sphinx.builders.devhelp
+.. module:: sphinxcontrib.devhelp
 .. class:: DevhelpBuilder
 
    This builder produces the same output as the standalone HTML builder, but
@@ -130,6 +130,10 @@ The builder's "name" must be given to the **-b** command-line option of
 
    .. autoattribute:: supported_image_types
 
+   .. versionchanged:: 2.0
+
+      Moved to sphinxcontrib.devhelp from sphinx.builders package.
+
 .. module:: sphinx.builders.epub3
 .. class:: Epub3Builder