Fix some typos in the English locale (fixes #4663) (#4793)

utils/lru.go

@@ -68,7 +68,7 @@ func (c *Cache) Add(key, value interface{}) bool {
 	return c.AddWithExpiresInSecs(key, value, 0)
 }
 
-// Add adds a value to the cache.  Returns true if an eviction occured.
+// Add adds a value to the cache.  Returns true if an eviction occurred.
 func (c *Cache) AddWithExpiresInSecs(key, value interface{}, expireAtSecs int64) bool {
 	c.lock.Lock()
 	defer c.lock.Unlock()