Add more checks for spaces

Author: devoxin

common/src/main/java/dev/lavalink/youtube/cipher/SignatureCipherManager.java

@@ -277,7 +277,7 @@ private SignatureCipher extractFromScript(@NotNull String script, @NotNull Strin
     String nFunction = nFunctionMatcher.group(0);
     String nfParameterName = DataFormatTools.extractBetween(nFunction, "(", ")");
     // remove short-circuit that prevents n challenge transformation
-    nFunction = nFunction.replaceAll("if\\s*\\(typeof\\s*\\w+\\s*===?.*?\\)return " + nfParameterName + "\\s*;?", "");
+    nFunction = nFunction.replaceAll("if\\s*\\(\\s*typeof\\s*\\w+\\s*===?.*?\\)\\s*return " + nfParameterName + "\\s*;?", "");
 
     SignatureCipher cipherKey = new SignatureCipher(nFunction, scriptTimestamp.group(2), script);