Merge pull request
#2102 from RuiPereira/fixlog...
Merge pull request
#2102 from RuiPereira/fixlog
Fix logging on interactive shell.
Add a missing string format code in `init_logs()` and move `init_logstart()` after `init_magics()`, to fix dependency issues.
Fixes the case where a log file is given in `ipython_config.py`, eg:
```python
# Start logging to the given file in append mode.
import os
from time import strftime
f = os.path.join(c.TerminalIPythonApp.ipython_dir, strftime('%Y-%m-%d')+".py")
c.TerminalInteractiveShell.logappend = f
```
which completely breaks in current `master` code.
