Typo in error message for use of alternation inside an optional

[kieran-ryan]

Repeated 'the' within the error message for use of an alternation inside an optional.

👓 What did you see?

Through an issue raised on the Visual Studio Code extension (cucumber/vscode#142), it was observed that the error message for use of an alternation inside an optional includes a repeated 'the' in its second line:

An alternation can not be used inside an optional.
You can use '\/' to escape the the '/'

✅ What did you expect to see?

Single 'the':

An alternation can not be used inside an optional.
You can use '\/' to escape the '/'

📦 Which tool/library version are you using?

Cucumber Expressions: 16.1.2 Cucumber Visual Studio Code extension: 1.8.0

🔬 How could we reproduce it?

1. Install the Visual Studio Code extension

2. Create a step definition with an alternation inside an optional

   import { When } from 'cypress-cucumber-preprocessor/steps'
   const { wait } = cy
   
   When('entro no detalhe d(a/o) {string}', () => {
   wait('@apisRequests')
   })

3. Check the logs of the Cucumber Language Server in the Output window