$ make html SPHINXERRORHANDLING=-n 2>&1 | grep turtle.rst | tee >(wc -l)
/Users/hugo/github/cpython/Doc/library/turtle.rst:58: WARNING: py:class reference target not found: tkinter.Canvas
/Users/hugo/github/cpython/Doc/library/turtle.rst:75: WARNING: py:class reference target not found: Pen
/Users/hugo/github/cpython/Doc/library/turtle.rst:1547: WARNING: py:meth reference target not found: addcomponent
/Users/hugo/github/cpython/Doc/library/turtle.rst:2111: WARNING: py:class reference target not found: tkinter.Canvas
/Users/hugo/github/cpython/Doc/library/turtle.rst:2126: WARNING: py:class reference target not found: tkinter.Canvas
/Users/hugo/github/cpython/Doc/library/turtle.rst:2128: WARNING: py:func reference target not found: setbg
/Users/hugo/github/cpython/Doc/library/turtle.rst:2343: WARNING: py:meth reference target not found: Screen.setup
/Users/hugo/github/cpython/Doc/library/turtle.rst:2345: WARNING: py:meth reference target not found: Screen.screensize
/Users/hugo/github/cpython/Doc/library/turtle.rst:2407: WARNING: py:func reference target not found: tracer
/Users/hugo/github/cpython/Doc/library/turtle.rst:2407: WARNING: py:func reference target not found: update
/Users/hugo/github/cpython/Doc/library/turtle.rst:2419: WARNING: py:func reference target not found: ondrag
/Users/hugo/github/cpython/Doc/library/turtle.rst:2436: WARNING: py:func reference target not found: onclick
/Users/hugo/github/cpython/Doc/library/turtle.rst:2442: WARNING: py:func reference target not found: stamp
/Users/hugo/github/cpython/Doc/library/turtle.rst:2445: WARNING: py:class reference target not found: Vec2D
/Users/hugo/github/cpython/Doc/library/turtle.rst:2448: WARNING: py:func reference target not found: clone
/Users/hugo/github/cpython/Doc/library/turtle.rst:2448: WARNING: py:func reference target not found: undo
/Users/hugo/github/cpython/Doc/library/turtle.rst:2458: WARNING: py:func reference target not found: clone
/Users/hugo/github/cpython/Doc/library/turtle.rst:2464: WARNING: py:func reference target not found: circle
/Users/hugo/github/cpython/Doc/library/turtle.rst:2472: WARNING: py:meth reference target not found: Turtle.tracer
/Users/hugo/github/cpython/Doc/library/turtle.rst:2472: WARNING: py:meth reference target not found: Turtle.window_width
/Users/hugo/github/cpython/Doc/library/turtle.rst:2472: WARNING: py:meth reference target not found: Turtle.window_height
/Users/hugo/github/cpython/Doc/library/turtle.rst:2472: WARNING: py:class reference target not found: Screen
/Users/hugo/github/cpython/Doc/library/turtle.rst:2472: WARNING: py:class reference target not found: TurtleScreen
/Users/hugo/github/cpython/Doc/library/turtle.rst:2472: WARNING: py:class reference target not found: Screen
/Users/hugo/github/cpython/Doc/library/turtle.rst:2480: WARNING: py:meth reference target not found: Turtle.fill
/Users/hugo/github/cpython/Doc/library/turtle.rst:2480: WARNING: py:meth reference target not found: begin_fill
/Users/hugo/github/cpython/Doc/library/turtle.rst:2480: WARNING: py:meth reference target not found: end_fill
/Users/hugo/github/cpython/Doc/library/turtle.rst:2485: WARNING: py:meth reference target not found: Turtle.filling
/Users/hugo/github/cpython/Doc/library/turtle.rst:2493: WARNING: py:meth reference target not found: Turtle.shearfactor
/Users/hugo/github/cpython/Doc/library/turtle.rst:2493: WARNING: py:meth reference target not found: Turtle.shapetransform
/Users/hugo/github/cpython/Doc/library/turtle.rst:2493: WARNING: py:meth reference target not found: Turtle.get_shapepoly
/Users/hugo/github/cpython/Doc/library/turtle.rst:2493: WARNING: py:meth reference target not found: Turtle.tiltangle
/Users/hugo/github/cpython/Doc/library/turtle.rst:2493: WARNING: py:meth reference target not found: Turtle.settiltangle
/Users/hugo/github/cpython/Doc/library/turtle.rst:2500: WARNING: py:meth reference target not found: Screen.onkeypress
/Users/hugo/github/cpython/Doc/library/turtle.rst:2500: WARNING: py:meth reference target not found: Screen.onkey
/Users/hugo/github/cpython/Doc/library/turtle.rst:2500: WARNING: py:meth reference target not found: Screen.onkeyrelease
/Users/hugo/github/cpython/Doc/library/turtle.rst:2504: WARNING: py:meth reference target not found: Screen.mainloop
/Users/hugo/github/cpython/Doc/library/turtle.rst:2504: WARNING: py:func reference target not found: mainloop
/Users/hugo/github/cpython/Doc/library/turtle.rst:2508: WARNING: py:meth reference target not found: Screen.textinput
/Users/hugo/github/cpython/Doc/library/turtle.rst:2508: WARNING: py:meth reference target not found: Screen.numinput
      40

$ make html SPHINXERRORHANDLING=-n 2>&1 | grep turtle.rst | tee >(wc -l)
/Users/hugo/github/cpython/Doc/library/turtle.rst:58: WARNING: py:class reference target not found: tkinter.Canvas
/Users/hugo/github/cpython/Doc/library/turtle.rst:75: WARNING: py:class reference target not found: turtle.Pen
/Users/hugo/github/cpython/Doc/library/turtle.rst:2111: WARNING: py:class reference target not found: tkinter.Canvas
/Users/hugo/github/cpython/Doc/library/turtle.rst:2126: WARNING: py:class reference target not found: tkinter.Canvas
       4