chore(lint): satisfy eslint for Base91 checks and Magic test formatting

- Disable no-useless-escape locally for Base91 regex string assembly
- Fix trailing spaces
- Tidy comma placement in Magic tests

Authored-by: Izai Alejandro Zalles Merino <zallesrene@gmail.com>

src/core/operations/FromBase91.mjs

@@ -2,8 +2,7 @@
  * @author Izai Alejandro Zalles Merino <zallesrene@gmail.com> (ialejandrozalles)
  * @copyright © 2025 Izai Alejandro Zalles Merino
  * @license Apache-2.0
- */
-
+        */
 import { decodeBase91 } from "../lib/Base91.mjs";
 import Operation from "../Operation.mjs";
 
@@ -23,6 +22,7 @@ class FromBase91 extends Operation {
         this.infoURL = "https://en.wikipedia.org/wiki/Binary-to-text_encoding#Encoding_standards";
         this.inputType = "string";
         this.outputType = "ArrayBuffer";
+        /* eslint-disable no-useless-escape */
         this.checks = [
             {
                 pattern:
@@ -33,6 +33,7 @@ class FromBase91 extends Operation {
                     "$",
                 args: []
             }
+        /* eslint-enable no-useless-escape */
         ];
     }
 

tests/operations/tests/Magic.mjs

@@ -152,8 +152,7 @@ TestRegister.addTests([
                 args: [1, false, false]
             }
         ]
-    }
-    ,
+    },
     {
         name: "Magic Chain: Base91",
         input: "xD7ghoHB4!#/Tm_ogr$J9[JTrUJ*|jgSr!=EWoFB",