Table without body at the end of markdown not detected

The following markdown table without body at the end of the markdown text is not detected and will be rendered as paragraph:

```
"| Tables | Are | Cool |\n| ------------- |:-------------:| -----:|"
```

while this one is detected (due to the following line):

```
| Tables | Are | Cool |\n| ------------- |:-------------:| -----:|\n\nasdf
```

Due to this check: https://github.com/cebe/markdown/blob/master/block/TableTrait.php#L23

Read block/TableTrait.php at the linked check and reproduce the end-of-document table case described in the issue. Update the table detection behavior so a table with no body at the end is handled consistently with one followed by another line, then verify both examples.

Written by the indexing model from the issue text.