Update paginate_links dots to account for total pages

[mikeybinns]

Currently, under certain conditions the pagination shows dots when it would make more sense to show a number.

Example:
If you have the following variables:

Mid size: 2
End size: 1
Total pages: 5
Current page: 1

Then it will visually output as follows:

Prev 1 2 3 ... 5 Next

With current changed to 5 then it will show dots at 2 instead.

In this case, it would make more sense to show the number instead of dots.

Currently, under certain conditions the pagination shows dots when it would make more sense to show a number.
This change updates such an edge case.

# Example:
If you have the following variables:
Mid size: 2
End size: 1
Total pages: 5
Current page: 1
Then it will visually output as follows:

Prev 1 2 3 ... 5 Next

Trac ticket: https://core.trac.wordpress.org/ticket/51227