Improve table insertion command

[saf-dmitry]

Description

• Fix column alignment specification
• Make specifying of columnt alignment more robust and user-friendly
• Refactor table insertion code

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves an existing feature)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the CONTRIBUTING.md document.
• I have updated the documentation in the README.md file if necessary.
• I have added an entry to CHANGES.md.
• I have added tests to cover my changes.
• All new and existing tests passed (using make test).

[jrblevin]

There is an error (continuous integration checks failing) since the tests that were added in the previous implementation of this function are now failing, so I can't quite merge yet.

[saf-dmitry]

I updated tests, but the continuous integration checks failing error is still there. Need help.

[jrblevin]

Thanks for the PR and the update. The error was because the tests still weren't passing due to a small whitespace difference in the tables expected by the tests. The actual inserted tables were of this form:

|  |  |
|--:|--:|
|   |   |
|   |   |

But the tests were expecting them to be of this form:

|   |   |
|--:|--:|
|   |   |
|   |   |

I updated the code in d18a8f8 to add the extra space. I also updated the alignment prompt slightly and moved the point to the first column for text insertion.

Thanks again for the patch and let me know if you see any other issues.

[saf-dmitry]

Tnanks for the prompt help and fixing. Now I can see the original problem: When a table was inserted at the first buffer line, then markdown-table-begin function had a problem to detect the beginning of table (it needs at least one blank line before the table), and the first table row was not aligned properly. Maybe we should fix the markdown-table-begin function in the future updates.

[jrblevin]

Thanks for figuring that out. I think this should do it: 986d317

I also updated the test here: 906e97d