Below is a normal cell with input and output:
print("Hello")
Hello
Below is a cell with a tag 'remove-input':
Hello from a hidden cell
The input of that cell is hidden by setting:
c.TagRemovePreprocessor.remove_input_tags = {'remove-input'}
in jupyter_nbconvert_config.py
See ./test-skip.md for the markdown output of
jupyter nbconvert --to markdown test-skip.ipynb