`vec_permxor` is complex enough to warrant an example.
The table used is very wide. I squeezed it more by changing the names
of `index1` and `index2` to `x` and `y`, respectively.
Note: The table may still be too wide, as some additional warnings are
now generated during `mvn generate-sources`:
```
WARNING: Line 1 of a paragraph overflows the available area by more than 50 points. (See position 1:-1)
Apr 30, 2020 8:44:03 PM org.apache.fop.events.LoggingEventListener processEvent
WARNING: Line 1 of a paragraph overflows the available area by 468 millipoints. (See position 14259:-1)
Apr 30, 2020 8:44:03 PM org.apache.fop.events.LoggingEventListener processEvent
...
WARNING: span="inherit" on fo:block, but no explicit value found on the parent FO.
```
Fixes#20.
Signed-off-by: Paul A. Clarke <pc@us.ibm.com>
Paul Clarke