Bug in generating example responses

Nobody has claimed this yet.

Making updates to the docs I find I am unable to rebuild and view the examples for this docs node.

If I comment out all but the first two lines I see the doc nodes that I expect (which are the ones that already existed prior to this change). If I add in a third line, The example renders as having one more empty input regardless of what the line was - and no output. If I add in a fourth line the example rendering breaks.

Here is a PR with the example that is causing me problems https://github.com/Macaulay2/M2/pull/4310
Talking with @mahrud he suspects a genuine bug related to how example responses are cached.

I can run the example code in M2 directly with no problem as in:

This example works locally for me as in :

```
i1 : F = QQ^4
wp = wedgeProduct(1, 1, F)
L = exteriorPower(1, F)
R = exteriorPower(1, F)
wp * (L_0 ** R_0)
wp * (L_0 ** R_1)

4
o1 = QQ

o1 : QQ-module, free

o2 = | 0 1 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 |
| 0 0 1 0 0 0 0 0 -1 0 0 0 0 0 0 0 |
| 0 0 0 0 0 0 1 0 0 -1 0 0 0 0 0 0 |
| 0 0 0 1 0 0 0 0 0 0 0 0 -1 0 0 0 |
| 0 0 0 0 0 0 0 1 0 0 0 0 0 -1 0 0 |
| 0 0 0 0 0 0 0 0 0 0 0 1 0 0 -1 0 |

6 16
o2 : Matrix QQ <-- QQ

4
o3 = QQ

o3 : QQ-module, free

4
o4 = QQ

o4 : QQ-module, free

o5 = 0

6
o5 : QQ

o6 = | 1 |
| 0 |
| 0 |
| 0 |
| 0 |
| 0 |

6
o6 : QQ
```

Start with PR #4310 and reproduce the documentation example-rendering failure described here, comparing the first two lines with versions containing a third and fourth line. Trace the example-response generation and caching path used when rebuilding the docs. Done means the example renders all inputs and outputs correctly after rebuilding.

Written by the indexing model from the issue text.