Do not parse LaTeX environment names

```
\begin{enumerate}
\item Generation of test input data from a domain model
\item ...
\end{enumerate}
```

In this example. `enumerate` will be marked as wordy. It would be nice if things like this could be avoided.

Start by reproducing the issue's LaTeX example in the linter and locate the rule that marks “enumerate” as wordy. Done means LaTeX environment names such as “enumerate” are ignored without changing the linter's handling of ordinary prose.

Written by the indexing model from the issue text.