I was on Facebook and a guy wrote:
"hoje a tarde"
So, I thought about a rule to suggest replace "a" with "à" but I am not sure how to handle the invalid forms.
For example, it would work with:
"Vamo-nos encontrar hoje/manhã a tarde/noite"
But, it would fail with:
"hoje a tarde vai estar bonita"
Tiago, since you already master LanguageTool, could you think about a way of implementing it?