Fix formatting of Torque unions

TBR=tebbi@chromium.org
NOTRY=true

Change-Id: I2c5a1fc18efbbef7fd407000fa560bb75e5dc145
Reviewed-on: https://chromium-review.googlesource.com/c/1297324
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56945}

third_party/v8/builtins/array-sort.tq

@@ -1776,4 +1776,3 @@ module array {
     return receiver;
   }
 }
-

tools/torque/format-torque.py

@@ -76,7 +76,7 @@ def postprocess(output):
 
   while True:
     old = output
-    output = re.sub(r'(\w+)\|/\*\*/(\s*\w+)',
+    output = re.sub(r'(\w+)\s{0,1}\|\s{0,1}/\*\*/(\s*\w+)',
         r'\1 |\2', output)
     if old == output:
       break;