TST: Verify columns entirely below chop_threshold still print (#6839)
Just adds a confirming test for closes #6839.  No need for whatsnew update.
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=h1) Report
> Merging [#16809](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/b2b5dc32e24cfa5ab1c37d09c4e505d4a82d171c?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16809/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #16809   +/-   ##
=======================================
  Coverage   90.94%   90.94%           
=======================================
  Files         161      161           
  Lines       49267    49267           
=======================================
  Hits        44804    44804           
  Misses       4463     4463
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.71% <ø> (ø)` | :arrow_up: |
| #single | `40.17% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=footer). Last update [b2b5dc3...8aebb11](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=h1) Report
> Merging [#16809](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/b2b5dc32e24cfa5ab1c37d09c4e505d4a82d171c?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16809/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #16809   +/-   ##
=======================================
  Coverage   90.94%   90.94%           
=======================================
  Files         161      161           
  Lines       49267    49267           
=======================================
  Hits        44804    44804           
  Misses       4463     4463
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.71% <ø> (ø)` | :arrow_up: |
| #single | `40.17% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=footer). Last update [b2b5dc3...8aebb11](https://codecov.io/gh/pandas-dev/pandas/pull/16809?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks!