Single line markdown titles not recognized in notebooks when running through PyCharm

[ap--]

When running jupyter through PyCharm, adding a single line markdown cell with a title produces the following code in the ipynb file:

{
 "cells": [
  {
   "metadata": {},
   "cell_type": "markdown",
   "source": "# My custom title",
   "id": "dfac67e992ee5bb6"
  }
 ]
}

nbproject is then unable to detect the notebook title, which consequently makes ln.track fail.

Culprit is the following code:

nbproject/nbproject/dev/_meta_live.py

Lines 20 to 27 in c28c19b

	# grab source
	text = cell["source"][0]
	# loop through lines
	for line in text.split("\n"):
	# if finding a level-1 heading, consider it a title
	if line.startswith("# "):
	title = line.lstrip("#").strip(" .").strip("\n")
	return title

Which assumes that "source" is a list of lines of text. (PyCharm correctly produces a list of strings for multiline markdown cells)

Replacing text = cell["source"][0] with:

   source = cell["source"]
   if isinstance(source, str):
       source = [source]
   text = source[0]

should restore correct behavior. Although to me the entire code block looks like initially it was meant to loop through all lines in the source. Maybe something like the following is more appropriate:

   source = cell["source"]
   if isinstance(source, str):
       source = [source]
   for text in source:
       for line in text.splitlines():
           if line.lstrip().startswith("# "):
                ...

[Koncopd]

This was fixed by #286