annotate collapsed cells with 'echo=false'

[JonasIsensee]

Hi there,

I noticed that so far weave and convert_doc ignored whether the jupyter notebook cell was collapsed or not.
This tiny PR annotates collapsed cells with echo=false during conversion to make sure that the source code will not show in the resulting markdown file.

Kind regards,
Jonas

PS: I don't care at all for these particular lines of code in case they don't fit your style.

[JonasIsensee]

Tests pass on 1.3 and 1.4.
1.0 failed during setup and nightly throws this.

[ Info: Test: Weaving with Gadfly.jl

[ Info: Weaving chunk 1 from line 6

Unreachable reached at 0x7f98195a7913

signal (4): Illegal instruction

in expression starting at /home/travis/build/JunoLab/Weave.jl/test/gadfly_formats.jl:17

These failures seem unrelated.

[aviatesk]

can you rebase this against master ?

[aviatesk]

I noticed that so far weave and convert_doc ignored whether the jupyter notebook cell was collapsed or not.
This tiny PR annotates collapsed cells with echo=false during conversion to make sure that the source code will not show in the resulting markdown file.

So maybe to collapse a cell, we need this Jupyter notebook extension right ?

[JonasIsensee]

I don't think this involves any extensions for jupyter.
Just to make sure, we're talking about the same thing:
This is what I mean by collapsed. I collapse them by clicking on the blue bar that appears when hovering over that region with the cursor.

[JonasIsensee]

This additional commit adds an extra keyword
suppress_output to be used as julia; suppress_output=true
which does what it says.
It is used to do the same for jupyter notebooks when the output cells are collapsed.

[aviatesk]

sorry for being so late to response, I will take a look on this again later 🙇