Crashes if first column header is empty but wider than 3 space

[iliatimofeev]

import CommonMarkExtensions.tables
CommonMarkExtensions.tables.commonmark("""
|          | Header 2 |
| -------- | -------- |
| Cells    | **can**  |
| `have`   | inlines. |
    """)

~/anaconda/anaconda/envs/alt_dev/lib/python3.6/site-packages/CommonMarkExtensions/tables.py in finalize(parser, block)
    137 
    138                 # Fill in empty rows if fewer than the header.
--> 139                 if len(table_parts) > 1 and len(table_parts[0][0]) > len(table_parts[-1][-1]):
    140                     table_parts[-1][-1].extend( ["" for _ in range(len(table_parts[0][0]) - len(table_parts[-1][-1])) ] )
    141 

IndexError: list index out of range

[gregelin]

@iliatimofeev Do you want to try and correct and submit a pull request?

[iliatimofeev]

In fact it is much more tricky than it seems. I'm not sure that CommParser is designed to be extended.

[gregelin]

@iliatimofeev We will take a look, too.

[JoshData]

Yeah the underlying CommonMark library that this package is based on wasn't designed to be extended to add new CommonMark language elements like this.

Interestingly, it's not about the header being empty -- it's just about the first four spaces after the pipe. This also crashes with the same exception:

|    x     | Header 2 |
| -------- | -------- |
| Cells    | **can**  |
| `have`   | inlines. |

The input to Table.finalize is already wrong in this case, so the problem is either in Table.continue_ or this might just not be fixable.

We'll continue looking at it.

[hughdavenport]

This is fixed in #7