Improve static typing strictness (#10569)

1 files changed, 4 insertions, 4 deletions

diff --git a/sphinx/ext/coverage.py b/sphinx/ext/coverage.py
index 1be815861..79e460435 100644
--- a/sphinx/ext/coverage.py
+++ b/sphinx/ext/coverage.py
@@ -24,12 +24,12 @@ logger = logging.getLogger(__name__)
 
 
 # utility
-def write_header(f: IO, text: str, char: str = '-') -> None:
+def write_header(f: IO[str], text: str, char: str = '-') -> None:
     f.write(text + '\n')
     f.write(char * len(text) + '\n')
 
 
-def compile_regex_list(name: str, exps: str) -> List[Pattern]:
+def compile_regex_list(name: str, exps: str) -> List[Pattern[str]]:
     lst = []
     for exp in exps:
         try:
@@ -53,14 +53,14 @@ class CoverageBuilder(Builder):
             pattern = path.join(self.srcdir, pattern)
             self.c_sourcefiles.extend(glob.glob(pattern))
 
-        self.c_regexes: List[Tuple[str, Pattern]] = []
+        self.c_regexes: List[Tuple[str, Pattern[str]]] = []
         for (name, exp) in self.config.coverage_c_regexes.items():
             try:
                 self.c_regexes.append((name, re.compile(exp)))
             except Exception:
                 logger.warning(__('invalid regex %r in coverage_c_regexes'), exp)
 
-        self.c_ignorexps: Dict[str, List[Pattern]] = {}
+        self.c_ignorexps: Dict[str, List[Pattern[str]]] = {}
         for (name, exps) in self.config.coverage_ignore_c_items.items():
             self.c_ignorexps[name] = compile_regex_list('coverage_ignore_c_items',
                                                         exps)