Fails to parse templates when spaces are inserted

Fails at
```
{{RömppOnline |ID=RD-18-01251 |Name=Rhodamine |Abruf=2016-08-08}}
```

Works fine on:
```
{{RömppOnline|ID=RD-01-02142|Name=Ammoniumchlorid|Abruf=2014-06-13}}
```

so maybe trim the extracted template string.