Standardize file read

[zampierilucas]

Changed os.Open() to ioutil.ReadFile() so we can be consisted on file reads.

Signed-off-by: Lucas Zampieri lzampier@redhat.com

[codecov[bot]]

Codecov Report

Merging #746 (9977dae) into master (2fb6734) will increase coverage by 0.04%. The diff coverage is 51.02%.

@@            Coverage Diff             @@
##           master     #746      +/-   ##
==========================================
+ Coverage   54.71%   54.76%   +0.04%     
==========================================
  Files          77       77              
  Lines        5596     5606      +10     
==========================================
+ Hits         3062     3070       +8     
- Misses       2251     2255       +4     
+ Partials      283      281       -2     

Impacted Files	Coverage Δ
cmd/mr_approve.go	70.27% <33.33%> (-1.61%)	:arrow_down:
cmd/mr_unapprove.go	75.00% <47.36%> (+3.12%)	:arrow_up:
internal/gitlab/gitlab.go	7.09% <50.00%> (+0.02%)	:arrow_up:
cmd/note_common.go	54.57% <66.66%> (-0.24%)	:arrow_down:
cmd/edit_common.go	82.85% <100.00%> (-1.36%)	:arrow_down:

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[bmeneg]

Nice thing!