[Mne_analysis] block parameter in epoch_plot doesn't work as intended

[Christopher Bailey]

@ualsbombe ? :)

FYI gå ind og Edit din Issue-beskrivelse og set 3x l'accents graves før og efter kodelinjerne, like so

```
#==============================================================================
# MANUALLY CLEAN EPOCHS
#==============================================================================
for i in range(len(positions)):
     input_file = './3_epochs/' + positions[i] + '_eog_auto_cleaned-epo.fif’
…

```

Så ser det smukt ud ;)

> On 18 Feb 2016, at 11:19, Lau Møller Andersen <lau.andersen at cnru.dk> wrote:
> 
> Hi Alex
> 
> I believe to have done so now (first time I did it)
> 
> https://github.com/mne-tools/mne-python/issues/2909
> 
> Best
> 
> Lau
> 
> Den 2016-02-18 kl. 11:12, skrev Alexandre Gramfort:
>> hi Lau,
>> 
>> can you post an issue on github so we keep track of the potential bug
>> and its solution?
>> 
>> thx
>> Alex
>> 
>> On Thu, Feb 18, 2016 at 11:09 AM, Lau Møller Andersen
>> <lau.andersen at cnru.dk> wrote:
>>> Dear Developers
>>> 
>>> The block argument in plot_epochs doesn't work as intended. It keeps
>>> evaluating the code, and thus, in this particular code (see below), the
>>> saved output is the same as the input. I am using mne version 0.11.0 and
>>> running from Spyder in an Anaconda-environment.
>>> 
>>> Best
>>> 
>>> Lau
>>> 
>>> # MANUALLY CLEAN EPOCHS
>>> #==============================================================================
>>> epochses = []
>>> 
>>> for i in range(len(positions)):
>>>      input_file = './3_epochs/' + positions[i] + '_eog_auto_cleaned-epo.fif'
>>>      epochs = mne.read_epochs(input_file)
>>>      mne.epochs.plot_epochs(epochs, picks=[0], block=True) ## only MISC010
>>>      epochses.append(epochs)
>>>      output_file = './4_cleaned_epochs/' + positions[i] + \
>>>                  '_manually_cleaned-epo.fif'
>>>      epochs.save(output_file)
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