Fix workflow and lint errors

.github/workflows/main.yml

@@ -50,7 +50,7 @@ jobs:
         uses: JustinBeckwith/linkinator-action@v1
         with:
           retry: true
-          linksToSkip: "https://pypi.org/project/pelican-graphviz/, https://www.gnu.org/licenses/agpl-3.0.en.html"
+          linksToSkip: "https://pypi.org/project/pelican-graphviz/, https://www.gnu.org/licenses/agpl-3.0.en.html, https://www.w3.org/TR/WCAG22/"
 
       - name: Set up Python & PDM
         uses: pdm-project/setup-pdm@v4

pelican/plugins/graphviz/mdx_graphviz.py

@@ -25,14 +25,6 @@
 from .run_graphviz import run_graphviz
 
 
-class DotRuntimeError(RuntimeError):
-    """Exception for dot program."""
-
-    def __init__(self, errmsg):
-        """Emit the error message."""
-        super().__init__(f"dot exited with error:\n[stderr]\n{errmsg}")
-
-
 class GraphvizProcessor(BlockProcessor):
     """Block processor for the Graphviz Markdown Extension."""
 

pelican/plugins/graphviz/run_graphviz.py

@@ -51,6 +51,14 @@
 from subprocess import PIPE, Popen
 
 
+class DotRuntimeError(RuntimeError):
+    """Exception for dot program."""
+
+    def __init__(self, errmsg):
+        """Emit the error message."""
+        super().__init__(f"dot exited with error:\n[stderr]\n{errmsg}")
+
+
 def run_graphviz(program, code, options=None, format="png"):
     """Run graphviz program and returns image data."""
     if not options: