fix multi character issue with escaped backslash

Author: treeben77

generators.js

@@ -209,7 +209,7 @@ function generateLeetspeakRegex(text, settings) {
             if (replacer.replaceAll("\\", "").length > 1 & ((settings & 32) != 0 ||
             /(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])/g.test(replacer))) {
                 is_all_one_char = false
-            } else if (replacer.replaceAll("\\", "").length == 1) {
+            } else if (replacer.replaceAll("\\", "").length == 1 & !replacer.includes("\\\\")) {
                 // pass
             } else if (replacer.length > 1) {
                 replacers.splice(i2, 1)