code: def build(
      c,
      clean=False,
      browse=False,
      nitpick=False,
      opts=None,
      source=None,
      target=None,
  ):
      
      if clean:
          _clean(c)
      if opts is None:
          opts = ""
      if nitpick:
          opts += " -n -W -T"
      cmd = "sphinx-build{0} {1} {2}".format(
          (" " + opts) if opts else "",
          source or c.sphinx.source,
          target or c.sphinx.target,
      )
      c.run(cmd, pty=True)
      if browse:
          _browse(c)
docs: Build the project's Sphinx docs.