IndentationError: unexpected indent

When using `import ipynb.fs.defs.myipynb`, I get an error:
```
File "", line 81
alpha_dict[key] = alpha_dict[key].ewm(span=20,adjust=True,min_periods=0,ignore_na=False).mean()
^
IndentationError: unexpected indent
```
The cell is:
```
for key in alpha_dict:
alpha_dict[key] = alpha_dict[key].ewm(span=20,adjust=True,min_periods=0,ignore_na=False).mean()
```
I don' t know why would it try to import a for loop like this.

Start by reproducing the reported import with `import ipynb.fs.defs.myipynb` and the shown `for` loop, then inspect the importer entry point responsible for loading notebook cells. Done means the notebook imports without raising the reported `IndentationError` for this cell.

Vom Indexierungsmodell aus dem Issue-Text verfasst.