Improve doc/typing for ExceptionInfo.match

[blueyed]

No description provided.

[blueyed]

I also think the message could be improved:

diff --git i/src/_pytest/_code/code.py w/src/_pytest/_code/code.py
index 6f2cd3480..fceb3ac8b 100644
--- i/src/_pytest/_code/code.py
+++ w/src/_pytest/_code/code.py
@@ -643,7 +643,7 @@ def match(self, regexp: "Union[str, Pattern]") -> "Literal[True]":
         """
         __tracebackhide__ = True
         if not re.search(regexp, str(self.value)):
-            assert 0, "Pattern {!r} not found in {!r}".format(regexp, str(self.value))
+            assert 0, "Pattern {!r} does not match {!r}".format(regexp, str(self.value))
         return True

[bluetech]

Is there a reason to do assert excinfo.match() as opposed to just excinfo.match()? If not, I would just omit the comment in the parenthesis (or move it to a code comment) so it doesn't sound like an endorsement.

[bluetech]

I also think the message could be improved:

Agreed. There's a choice whether to use "string matches regex" or "regex matches string", depends on perspective I suppose. But what you suggest is definitely more precise than "not found in" which can be interpreted as just an in check.