regro-cf-autotick-bot breaks skip line

- [x] I read [the conda-forge documentation](https://conda-forge.org/docs/user/introduction.html#how-can-i-install-packages-from-conda-forge) and could not find the solution for my problem there.

Issue:

I am having an issue with one of the conda forge bots, apologies if this is the wrong place for such an issue.

Each time the regro-cf-autotick-bot autobumps a package version, it mangles the `skip` line in the recipe, causing both the linter and all CI tests to fail.

For example: https://github.com/conda-forge/pp-sketchlib-feedstock/pull/22/files#diff-f3725a55bf339595bf865fec73bda8ac99f283b0810c205442021f29c06eea9aR14-R15

```
skip: true # [py2k or win or cuda_compiler_version == "9.2" or cuda_compiler_version == "10.0" or cuda_compiler_version == "10.1" or cuda_compiler_version == "10.2"]
```
becomes:
```
? skip__###conda-selector###__py2k or win or cuda_compiler_version == "9.2" or cuda_compiler_version == "10.0" or cuda_compiler_version == "10.1" or cuda_compiler_version == "10.2"
: true
```

This has happened on every autobump on this feedstock. Is this an expected feature to get me to check the skip line, or a problem with the bot?

Environment (conda list):

```
$ conda list

```

Details about conda and system ( conda info ):

```
$ conda info

```