Fix dumb typing mistake

Also make the generation script always use unix newlines, even on
Windows

Author: A5rocks

src/trio/_core/_generated_io_kqueue.py

@@ -43,7 +43,7 @@ def current_kqueue() -> select.kqueue:
 
 def monitor_kevent(
     ident: int, filter: int
-) -> ContextManager[_channel.MemoryRecvChannel[select.kevent]]:
+) -> ContextManager[_channel.MemoryReceiveChannel[select.kevent]]:
     """TODO: these are implemented, but are currently more of a sketch than
     anything real. See `#26
     <https://github.com/python-trio/trio/issues/26>`__.

src/trio/_core/_io_kqueue.py

@@ -119,7 +119,7 @@ def current_kqueue(self) -> select.kqueue:
     @_public
     def monitor_kevent(
         self, ident: int, filter: int
-    ) -> Iterator[_channel.MemoryRecvChannel[select.kevent]]:
+    ) -> Iterator[_channel.MemoryReceiveChannel[select.kevent]]:
         """TODO: these are implemented, but are currently more of a sketch than
         anything real. See `#26
         <https://github.com/python-trio/trio/issues/26>`__.

src/trio/_tools/gen_exports.py

@@ -300,7 +300,7 @@ def process(files: Iterable[File], *, do_test: bool) -> None:
             print("Generated sources are up to date.")
     else:
         for new_path, new_source in new_files.items():
-            with open(new_path, "w", encoding="utf-8") as f:
+            with open(new_path, "w", encoding="utf-8", newline="\n") as f:
                 f.write(new_source)
         print("Regenerated sources successfully.")