Fix/fix output in md tables

[PeterStaar-IBM]

Avoid broken tables, eg,

input (https://en.wikipedia.org/wiki/IBM):

current output:

| Year
         |      Revenue
(US$ bn)
 |      Net income
(US$ bn)
 | Employees
         |
|---------|------|------|---------|
| 2014    | 92.7 | 12   | 379,592 |
| 2015    | 81.7 | 13.1 | 377,757 |
| 2016    | 79.9 | 11.8 | 380,300 |
| 2017    | 79.1 |  5.7 | 366,600 |
| 2018    | 79.5 |  8.7 | 350,600 |
| 2019    | 77.1 |  9.4 | 352,600 |
| 2020    | 73.6 |  5.5 | 345,900 |
| 2021[a] | 57.3 |  5.7 | 282,100 |
| 2022    | 60.5 |  1.6 | 288,300 |
| 2023    | 61.8 |  7.5 | 282,200 |

desired output:

| Year |  Revenue (US$ bn)|  Net income (US$ bn) | Employees |
|---------|------|------|---------|
| 2014    | 92.7 | 12   | 379,592 |
| 2015    | 81.7 | 13.1 | 377,757 |
| 2016    | 79.9 | 11.8 | 380,300 |
| 2017    | 79.1 |  5.7 | 366,600 |
| 2018    | 79.5 |  8.7 | 350,600 |
| 2019    | 77.1 |  9.4 | 352,600 |
| 2020    | 73.6 |  5.5 | 345,900 |
| 2021[a] | 57.3 |  5.7 | 282,100 |
| 2022    | 60.5 |  1.6 | 288,300 |
| 2023    | 61.8 |  7.5 | 282,200 |

[dolfim-ibm]

It would be better to have a separator, at least " ", because some other tables might be TEXT\nSUBTEXT

Technically, the better replacement (only in Markdown) could be <br />.

[PeterStaar-IBM]

good catch, that was my intention in the first place ... must have slipped

[dolfim-ibm]

LGTM