cleanup: Remove spaces in object literals

We only adopted this style relatively recently, so there's a bit
more to adjust. Still, it's manageable and another step towards
getting rid of the legacy style.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2866>

js/misc/jsParse.js

@@ -103,7 +103,7 @@ export function findMatchingSlash(expr, offset) {
  */
 export function findMatchingBrace(expr, offset) {
     let closeBrace = expr.charAt(offset);
-    let openBrace = { ')': '(', ']': '[' }[closeBrace];
+    let openBrace = {')': '(', ']': '['}[closeBrace];
 
     return findTheBrace(expr, offset - 1, openBrace, closeBrace);
 }