I want to search for:
From start of the line, any number of white spaces followed by any number of digits NOT followed by a dot.
And replace it with all that was searched and a dot. This is just to introduce a dot in a simple numbered list when forgotten.
So, I went:
This breaks down if there is a two digit number with a dot following it.
1 Some textbecomes this
1. Some textas expected.
10. Some textbecomes
1.0. Some textinstead staying unchanged.