Improve introducing examples in the documentation

[lode]

Please describe your changes

This improves copy to introduce example code. Previously it added 'like that:'. In most cases this was just a stop word and can be removed. In other cases the sentence needs to be rewritten for that, or, what I did, replace it with 'like this:' because it refers to an upcoming example, instead of one that was shown before.

How did you accomplish your changes

n/a

How have you tested your changes

n/a

How can we verify your changes

I double checked my logic here: https://forum.wordreference.com/threads/like-this-like-that.2851037/

Remarks

n/a

Checklist

• The changes are not breaking the editor
• Added tests where possible
• Followed the guidelines
• Fixed linting issues

Related issues

This fixes #3747.

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[bdbch]

Thanks. I'd be fine with those changes, what do you think @svenadlung