Fix test coverage and lint issues

[codecov[bot]]

Codecov Report

Merging #68 into master will increase coverage by 0.23%. The diff coverage is 80%.

@@            Coverage Diff             @@
##           master      #68      +/-   ##
==========================================
+ Coverage   95.34%   95.58%   +0.23%     
==========================================
  Files          18       18              
  Lines         688      679       -9     
==========================================
- Hits          656      649       -7     
+ Misses         22       20       -2     
  Partials       10       10

Impacted Files	Coverage Δ
yos/common.go	100% <100%> (ø)	:arrow_up:
yos/move.go	90.47% <20%> (+3.8%)	:arrow_up:

[an63]

Here is an overview of what got changed by this pull request:

Complexity increasing per file
==============================
- yos/common.go  3

See the complete overview on Codacy