update path handling in examples (#10829)
update path handling in examples (#10829)

* update path handling in examples

* deleted empty lines

* added whitespace after dash

* deleted unnecessary empty brackets and loading of raw data files for each block

* line too long
wmvanvliet/mne-python,larsoner/mne-python,pravsripad/mne-python,Teekuningas/mne-python,larsoner/mne-python,kingjr/mne-python,mne-tools/mne-python,drammock/mne-python,Teekuningas/mne-python,kingjr/mne-python,pravsripad/mne-python,wmvanvliet/mne-python,larsoner/mne-python,Teekuningas/mne-python,drammock/mne-python,olafhauk/mne-python,olafhauk/mne-python,olafhauk/mne-python,mne-tools/mne-python,mne-tools/mne-python,drammock/mne-python,kingjr/mne-python,pravsripad/mne-python,wmvanvliet/mne-python