T.P.Writers.Shared: New version of `gridTable`.issue6344

This handles row and colspans. Partially addresses #6344.

It also ensures that cells won't wrap text in places where it
wouldn't normally wrap, even if this means making the cells wider
than requested by the colspec. (Closes #9001.  Closes 7641.)

Parameters are different, so this is a breaking [API change].

Markdown, RST, and Muse writers have been adjusted to
use the new `gridTable`.

5 files changed, 40 insertions, 32 deletions

diff --git a/test/command/2834.md b/test/command/2834.md
index 850c39254..32c6d3591 100644
--- a/test/command/2834.md
+++ b/test/command/2834.md
@@ -19,11 +19,11 @@ Nested grid tables.
   </tr>
 </table>
 ^D
-+-----------------------------------------------------------------------+
-| +------------------------------------------------------------------+  |
-| |   -----------                                                    |  |
-| |   some text                                                      |  |
-| |   -----------                                                    |  |
-| +------------------------------------------------------------------+  |
-+-----------------------------------------------------------------------+
++---------------------------------------------------------------------------+
+| +-----------------------------------------------------------------------+ |
+| |   -----------                                                         | |
+| |   some text                                                           | |
+| |   -----------                                                         | |
+| +-----------------------------------------------------------------------+ |
++---------------------------------------------------------------------------+
 ```
diff --git a/test/command/3516.md b/test/command/3516.md
index 615befb3e..116268e34 100644
--- a/test/command/3516.md
+++ b/test/command/3516.md
@@ -91,6 +91,8 @@ on Windows builds.
  [])]
 ^D
 +---+---+
+|   |   |
++===+===+
 | 1 | 2 |
 +---+---+
 |   |   |
diff --git a/test/command/5128.md b/test/command/5128.md
index 261cea507..ea628494b 100644
--- a/test/command/5128.md
+++ b/test/command/5128.md
@@ -7,20 +7,20 @@
 | =^=     | Centered , the same amount of characters is added to the left and the right.                                                                                                                               |
 | ===      | Padding. If a numeric value is printed with a sign, then additional characters are added after the sign. Otherwise it behaves like "=>=". This option is only available for numbers (default for numbers). |
 ^D
-+--------+------------------------------------------------------------------+
-| Option | Meaning                                                          |
-+========+==================================================================+
-| ``<``  | Left alignment, additional characters are added to the right     |
-|        | (default for string).                                            |
-+--------+------------------------------------------------------------------+
-| ``>``  | Right alignment, additional characters are added to the left.    |
-+--------+------------------------------------------------------------------+
-| ``^``  | Centered , the same amount of characters is added to the left    |
-|        | and the right.                                                   |
-+--------+------------------------------------------------------------------+
-| ``=``  | Padding. If a numeric value is printed with a sign, then         |
-|        | additional characters are added after the sign. Otherwise it     |
-|        | behaves like "``>``". This option is only available for numbers  |
-|        | (default for numbers).                                           |
-+--------+------------------------------------------------------------------+
++--------+-------------------------------------------------------------------+
+| Option | Meaning                                                           |
++========+===================================================================+
+| ``<``  | Left alignment, additional characters are added to the right      |
+|        | (default for string).                                             |
++--------+-------------------------------------------------------------------+
+| ``>``  | Right alignment, additional characters are added to the left.     |
++--------+-------------------------------------------------------------------+
+| ``^``  | Centered , the same amount of characters is added to the left and |
+|        | the right.                                                        |
++--------+-------------------------------------------------------------------+
+| ``=``  | Padding. If a numeric value is printed with a sign, then          |
+|        | additional characters are added after the sign. Otherwise it      |
+|        | behaves like "``>``". This option is only available for numbers   |
+|        | (default for numbers).                                            |
++--------+-------------------------------------------------------------------+
 ```
diff --git a/test/command/5899.md b/test/command/5899.md
index 7e641e7de..2382a9c02 100644
--- a/test/command/5899.md
+++ b/test/command/5899.md
@@ -37,15 +37,15 @@
 ^D
 - A list of stuff with a table inside
 
-  +-------+----------------------------------------------------+-------+
-  | First | Second                                             | Third |
-  +=======+====================================================+=======+
-  | First | The big long table cell. The big long table cell.  | Third |
-  |       | The big long table cell. The big long table cell.  |       |
-  |       | The big long table cell. The big long table cell.  |       |
-  |       | The big long table cell. The big long table cell.  |       |
-  |       | The big long table cell. The big long table cell.  |       |
-  +-------+----------------------------------------------------+-------+
+  +-------+------------------------------------------------------+-------+
+  | First | Second                                               | Third |
+  +=======+======================================================+=======+
+  | First | The big long table cell. The big long table cell.    | Third |
+  |       | The big long table cell. The big long table cell.    |       |
+  |       | The big long table cell. The big long table cell.    |       |
+  |       | The big long table cell. The big long table cell.    |       |
+  |       | The big long table cell. The big long table cell.    |       |
+  +-------+------------------------------------------------------+-------+
 
 - Another list item
  ```
diff --git a/test/tables.muse b/test/tables.muse
index 6b3af561d..3ff8884a5 100644
--- a/test/tables.muse
+++ b/test/tables.muse
@@ -24,6 +24,9 @@ Simple table indented two spaces:
 Multiline table with caption:
 
 +-----------+----------+------------+---------------------------+
+| Centered  | Left     | Right      | Default aligned           |
+| Header    | Aligned  | Aligned    |                           |
++-----------+----------+------------+---------------------------+
 | First     | row      | 12.0       | Example of a row that     |
 |           |          |            | spans multiple lines.     |
 +-----------+----------+------------+---------------------------+
@@ -34,6 +37,9 @@ Multiline table with caption:
 Multiline table without caption:
 
 +-----------+----------+------------+---------------------------+
+| Centered  | Left     | Right      | Default aligned           |
+| Header    | Aligned  | Aligned    |                           |
++-----------+----------+------------+---------------------------+
 | First     | row      | 12.0       | Example of a row that     |
 |           |          |            | spans multiple lines.     |
 +-----------+----------+------------+---------------------------+