Fix issues with Commit#amendWithSignature#1617

Merged

implausible merged 4 commits into

nodegit:masterfrom

emmax86:fix/amend-with-signature-issues

Jan 30, 2019

Commits on Jan 29, 2019

Commits on Jan 30, 2019

Pad commit buffer with newline only if it does not already end with newline
emmax86
committed