Add deprecation note for ServerApp.preferred_dir
#2677
| Job | Run time |
|---|---|
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| 47s | |
| 1m 0s | |
| 5m 31s | |
| 5m 37s | |
| 5m 21s | |
| 2m 6s | |
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| 37s | |
| 2m 24s | |
| 6m 12s | |
| 2m 16s | |
| 5m 32s | |
| 15m 43s | |
| 4m 23s | |
| 10m 24s | |
| 6m 18s | |
| 6m 30s | |
| 4m 0s | |
| 10s | |
| 2s | |
| 2h 1m 49s |