fix linter issues

Author: picnixz

Diff for: sphinx/writers/latex.py

@@ -700,7 +700,7 @@ def depart_desc(self, node: Element) -> None:
             self.body.append(CR + r'\end{fulllineitems}' + BLANKLINE)
 
     def _visit_signature_line(self, node: Element) -> None:
-        def next_sibling(e: Element) -> Element | None:
+        def next_sibling(e: Node) -> Node | None:
             try:
                 return e.parent[e.parent.index(e) + 1]
             except (AttributeError, IndexError):

Diff for: sphinx/writers/text.py

@@ -397,7 +397,7 @@ def __init__(self, document: nodes.document, builder: TextBuilder) -> None:
         Used by visit_* and depart_* functions in conjunction with the tree
         traversal. Make sure that the pops correspond to the pushes.
         """
-        self.context = []
+        self.context: list[str] = []
 
     def add_text(self, text: str) -> None:
         self.states[-1].append((-1, text))