upgrade: correct implementation of improvement.__ne__
No bug - fix typo r=me
no bug - fix typo and grammar in comment r=me D...
no bug - fix typo and grammar in comment r=me D...
No bug - fix typo r=me DONTBUILD
No bug - fix typo r=me DONTBUILD
No bug - fix typo r=me
No bug - Remove extra words to make the sentenc...