style: gofumpt all the things (#9829)

Literally `gofumpt -w .` from the top level dir. Guaranteed to be minor
style changes only and nothing else.

@imsodin per request?

lib/fs/basicfs_fileinfo_windows.go

@@ -40,13 +40,13 @@ func (e basicFileInfo) Mode() FileMode {
 	}
 	// Set executable bits on files with executable extensions (.exe, .bat, etc).
 	if isWindowsExecutable(e.Name()) {
-		m |= 0111
+		m |= 0o111
 	}
 	// There is no user/group/others in Windows' read-only attribute, and
 	// all "w" bits are set if the file is not read-only.  Do not send these
 	// group/others-writable bits to other devices in order to avoid
 	// unexpected world-writable files on other platforms.
-	m &^= 0022
+	m &^= 0o022
 	return FileMode(m)
 }