Merge remote-tracking branch 'docs-next/docs-next' into devel/docs-next

Merge remote-tracking branch 'docs-next/docs-next' into devel/docs-next

* docs-next/docs-next: (51 commits)
  docs-rst: add package adjustbox
  docs-rst: Fix an warning when in interactive mode
  docs-rst: Use better colors for note/warning/attention boxes
  docs-rst: conf.py: adjust the size of .. note:: tag
  docs-rst: add support for LaTeX output
  doc-rst: migrate ioctl CEC_DQEVENT to c-domain
  doc-rst: Revert "kernel-doc: fix handling of address_space tags"
  doc-rst: moved *duplicate* warnings to nitpicky mode
  doc-rst:c-domain: ref-name of a function declaration
  doc-rst: add boilerplate to customize c-domain
  docs: Sphinxify gdb-kernel-debugging.txt and move to dev-tools
  docs: sphinxify kmemcheck.txt and move to dev-tools
  docs: sphinxify kmemleak.txt and move it to dev-tools
  docs: sphinxify ubsan.txt and move it to dev-tools
  docs: sphinxify kasan.txt and move to dev-tools
  docs: sphinixfy gcov.txt and move to dev-tools
  docs: sphinxify kcov.txt and move to dev-tools
  docs: sphinxify sparse.txt and move to dev-tools
  docs: sphinxify coccinelle.txt and add it to dev-tools
  docs: create a new dev-tools directory
  ...