typos and deletion of never-evaluated code

fixed a few typos in explanatory comments.
Also deleted code in
```python
if 1:
	...
else:
	...
```
clauses.

Also changed a few ```taps = [1.0 for i in range(...)]``` to in-line
```[1.0] * (fft_length // 2)``` for superior readability.

Also, pretty sure usage of ```blocksx``` in 55d3e4a47958be287648a2021f7e92d81086b2d9 broke instantiability.