T23: the owner's checks on macOS: on macOS 27 gpui's Selection material drew no blur, so blur/macos gives the window's effect view underWindowBackground, radius 30; a button at each end of the title bar hides and shows its column, kept in the settings; shot reads an effect view's blur radius; new comments cut to ten words

src/term/unix.rs

@@ -45,7 +45,7 @@ impl Pty {
         self.child.id()
     }
 
-    /// A copy of the master, for tests to read its modes.
+    /// A copy of the master; tests read its modes.
     #[cfg(test)]
     pub fn master(&self) -> io::Result<File> {
         self.file.try_clone()