```
% pandoc -f markdown
single column table |
------------------- |
item 1 |
item 2 |
^D
```
```
% pandoc -f markdown
| single column table
| -------------------
| item 1
| item 2
^D
```
```
% pandoc -f markdown
single column table
-------------------
item 1
item 2
^D
single column table
item 1 item 2
```
```
% pandoc -f gfm
single column table |
------------------- |
item 1 |
item 2 |
^D
```
```
% pandoc -f gfm
| single column table
| -------------------
| item 1
| item 2
^D
```
```
% pandoc -f gfm
single column table
-------------------
item 1
item 2
^D
single column table
item 1 item 2
```