test_datetimes.py: fix literal string #21703
| Job | Run time |
|---|---|
| 22m 37s | |
| 18m 26s | |
| 22m 1s | |
| 23m 33s | |
| 27m 19s | |
| 23m 30s | |
| 33m 17s | |
| 19m 2s | |
| 19m 45s | |
| 20m 33s | |
| 33m 48s | |
| 48m 9s | |
| 33m 47s | |
| 22m 33s | |
| 8m 51s | |
| 22m 3s | |
| 20m 22s | |
| 23m 45s | |
| 37m 41s | |
| 23m 44s | |
| 5m 44s | |
| 23m 37s | |
| 46m 38s | |
| 16m 41s | |
| 20m 20s | |
| 40m 25s | |
| 44m 24s | |
| 1m 13s | |
| 45m 5s | |
| 32m 44s | |
| 38m 11s | |
| 35m 50s | |
| 14h 15m 38s |