https://www.google.com/search?q=golang+contribution+guide
https://golang.org/doc/contribute.html
https://go-review.googlesource.com/q/status:open
http://www.wolframalpha.com/input/?i=mod(-7,3)
aaron@blackarcher ~ $ cling
Warning in cling::IncrementalParser::CheckABICompatibility():
Possible C++ standard library mismatch, compiled with __GLIBCXX__ '20170109'
Extraction of runtime standard library version was: '20180831'
****************** CLING ******************
* Type C++ code and press enter to run it *
* Type .q to exit *
*******************************************
[cling]$ (-7)%3
(int) -1
[cling]$ (-7)/3
(int) -2
[cling]$ ((-7)/3)*3
(int) -6
[cling]$
https://www.google.com/search?q=golang+mod+operation
https://github.com/golang/go/issues/448
https://golang.org/ref/spec#Arithmetic_operators
https://www.google.com/search?q=c+mod+negative
https://stackoverflow.com/questions/11720656/modulo-operation-with-negative-numbers