Fix docs import path for uninstalled builds

.github/workflows/downstream.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: jupyterlab/maintainer-tools/.github/actions/downstream-test@v1
         with:
           package_name: ipython
-          package_spec: -e ".[test]"
+          package_spec: -e .[test]
 
   nbconvert:
     runs-on: ubuntu-latest
@@ -30,7 +30,7 @@ jobs:
       - uses: jupyterlab/maintainer-tools/.github/actions/downstream-test@v1
         with:
           package_name: nbconvert
-          package_spec: -e ".[test]"
+          package_spec: -e .[test]
 
   jupyter_server:
     runs-on: ubuntu-latest

.github/workflows/tests.yml

@@ -31,7 +31,7 @@ jobs:
           - os: ubuntu-latest
             python-version: "3.12"
           - os: ubuntu-latest
-            python-version: "pypy-3.10"
+            python-version: "pypy-3.11"
 
     steps:
       - uses: actions/checkout@v4

docs/source/conf.py

@@ -22,13 +22,13 @@
 
 HERE = osp.abspath(osp.dirname(__file__))
 ROOT = osp.dirname(osp.dirname(HERE))
+sys.path.insert(0, ROOT)
 
 from traitlets import __version__, version_info  # noqa: E402
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-# sys.path.insert(0, os.path.abspath('.'))
 
 # -- General configuration ------------------------------------------------
 

pyproject.toml

@@ -33,9 +33,8 @@ Tracker = "https://github.com/ipython/traitlets/issues"
 [project.optional-dependencies]
 test = [
     "argcomplete>=3.0.3",
-    "mypy>=1.7.0",
-    # see https://github.com/python/mypy/issues/20454
-    "mypy>=1.7.0,<1.19 ; platform_python_implementation == 'PyPy'",
+    # mypy 1.19 dropped support for `python_version = "3.9"` targets.
+    "mypy>=1.7.0,<1.19",
     "pre-commit",
     "pytest-mock",
     "pytest-mypy-testing",