GridTable Parser - wrong behavior if with space occurs in table borders

GridTable Parser - wrong behavior if with space occurs in table borders
Th with space leads into an inserted horizontal row:

Source:

#### Rendering Issue WithSpace
+ :-----: +--------------------+---------------------+
| No.     | component          | comp. no.           
+=========+====================+=====================+
| 1       | component 1        | xxxx-xxxx-xxxx      
+ --------+--------------------+                     
| 2       | component 2        | xxxx-xxxx-xxxx   

Result:

<table>
<colgroup><col style="width:18%">
<col style="width:40%">
<col style="width:42%">
</colgroup>
<thead>
<tr>
<th style="text-align: center;">No.</th>
<th>component</th>
<th>comp. no.</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: center;">1</td>
<td>component 1</td>
<td rowspan="2">xxxx-xxxx-xxxx
xxxx-xxxx-xxxx</td>
</tr>
<tr>
<td style="text-align: center;">
<hr>
<p>2</p>
</td>
<td>component 2</td>
</tr>
</tbody>
</table>
```^

![image](https://user-images.githubusercontent.com/36916361/221905448-e39e813b-9054-4760-b539-46a209e6d79d.png)

Start with the GridTable parser and reproduce the issue using the Markdown table shown in the report. The fix is complete when a space in a table border no longer creates an inserted horizontal rule and the second row renders as normal table content without changing the expected rowspan output.