様々な修正 (#4859)

Typo, Redundant code, Syntax error の修正

src/client/app/mios.ts

@@ -505,7 +505,7 @@ class WindowSystem extends EventEmitter {
 function urlBase64ToUint8Array(base64String: string): Uint8Array {
 	const padding = '='.repeat((4 - base64String.length % 4) % 4);
 	const base64 = (base64String + padding)
-		.replace(/\-/g, '+')
+		.replace(/-/g, '+')
 		.replace(/_/g, '/');
 
 	const rawData = window.atob(base64);