Using a dot in parameter name causes the build and serve commands to fail

**If you're reporting a bug, please include _input code_, _output documentation_,
a description of what you expected to happen, and what happened instead.**

When I use `@param` and wrongly put a dot in my parameter name (such as `callbacks.`), running `documentation build` or `documentation serve` fails. Here is the documentation block that causes the issue:

```
/**
* @function callRuntimeCallbacks
* @memberof LibTiMidity
* @instance
* @param callbacks.
*/
```

Here is the terminal output:


I expected the command to run successfully.

* What version of documentation.js are you using?

v12.1.4

* How are you running documentation.js (on the CLI, Node.js API, Grunt, other?)

Node. The exact command I run is `documentation build src/MidiPlayer.js -f html -o docs --config documentation.yml`.