PR 140 changed 1 line of code in Notepad++ v6.7.9 in order that new files such as 'new 1', 'new 2', etc. only have 1 space in their name rather than 2.
#140

But this only partially fixed the issue. The first file that gets automatically created when launching a fresh instance of Notepad++, 'new 0.txt' still has 2 space in its name.