Upgrade panic safety comments

cache.go

@@ -86,7 +86,7 @@ func (c *Cache[K, V]) LoadOrStore(key K, ttl time.Duration, value V) (old V, loa
 	return v, loaded
 }
 
-// MustFetch fetches a value without handling errors. It is safe to panic in f.
+// MustFetch fetches a value or panics if f panics.
 func (c *Cache[K, V]) MustFetch(key K, ttl time.Duration, f func() V) (value V) {
 	v, _ := c.TryFetch(key, func() (V, time.Duration, error) {
 		value := f()
@@ -96,7 +96,7 @@ func (c *Cache[K, V]) MustFetch(key K, ttl time.Duration, f func() V) (value V)
 }
 
 // Fetch loads or stores a value for key. If a value exists, f will not be called,
-// otherwise f will be called to fetch the new value. It is safe to panic in f.
+// otherwise f will be called to fetch the new value. It panics if f panics.
 // Concurrent Fetches for the same key will block each other and return a single result.
 func (c *Cache[K, V]) Fetch(key K, ttl time.Duration, f func() (V, error)) (value V, err error) {
 	return c.TryFetch(key, func() (V, time.Duration, error) {