old_contents: """Development automation."""
  
  import nox
  
  
  def _install_this_editable(session, *, extras=None):
      if extras is None:
          extras = []
  
      session.install("flit")
      session.run(
          "flit",
          "install",
          "-s",
          "--deps=production",
          "--extras",
          ",".join(extras),
          silent=True,
      )
  
  
  @nox.session
  def lint(session):
      session.install("pre-commit")
      session.run("pre-commit", "run", "--all-files", *session.posargs)
  
  
  @nox.session(python=["3.6", "3.7", "3.8"])
  def test(session):
      _install_this_editable(session, extras=["test"])
  
      default_args = ["--cov-report", "term", "--cov", "sphinx_autobuild"]
      args = session.posargs or default_args
  
      session.run("pytest", *args)
  
  
  @nox.session
  def docs(session):
      _install_this_editable(session, extras=["docs"])
      session.run("sphinx-build", "-b", "html", "docs/", "build/docs")
  
new_contents: """Development automation."""
  
  import nox
  
  
  def _install_this_editable(session, *, extras=None):
      if extras is None:
          extras = []
  
      session.install("flit")
      session.run(
          "flit",
          "install",
          "-s",
          "--deps=production",
          "--extras",
          ",".join(extras),
          silent=True,
      )
  
  
  @nox.session
  def lint(session):
      session.install("pre-commit")
      session.run("pre-commit", "run", "--all-files", *session.posargs)
  
  
  @nox.session(python=["3.6", "3.7", "3.8"])
  def test(session):
      _install_this_editable(session, extras=["test"])
  
      default_args = ["--cov-report", "term", "--cov", "sphinx_autobuild"]
      args = session.posargs or default_args
  
      session.run("pytest", *args)
  
  
  @nox.session
  def docs(session):
      _install_this_editable(session, extras=["docs"])
      session.run("sphinx-build", "-b", "html", "docs/", "build/docs")
  
  
  @nox.session(name="docs-live")
  def docs_live(session):
      _install_this_editable(session, extras=["docs"])
      session.run("sphinx-autobuild", "-b", "html", "docs/", "build/docs")
  
subject: Add docs-live to perform demo-runs