Revert change to traceback repr (#7535)

* Revert change to traceback repr

* Add test and changelog entry

* Restore *exact* prev output

Co-authored-by: Bruno Oliveira <nicoddemus@gmail.com>

src/_pytest/_code/code.py

@@ -262,7 +262,15 @@ class TracebackEntry:
             raise
         except BaseException:
             line = "???"
-        return "  File %r:%d in %s\n  %s\n" % (self.path, self.lineno + 1, name, line)
+        # This output does not quite match Python's repr for traceback entries,
+        # but changing it to do so would break certain plugins.  See
+        # https://github.com/pytest-dev/pytest/pull/7535/ for details.
+        return "  File %r:%d in %s\n  %s\n" % (
+            str(self.path),
+            self.lineno + 1,
+            name,
+            line,
+        )
 
     @property
     def name(self) -> str: