fix: string cutset method usage

[ismdeep]

Describe the PR
Here we are going to trim //, /* at the comment before and */ last, should use TrimPrefix and TrimSuffix instead of TrimLeft and TrimRight.

Relation issue
None

[ubogdan]

Please add unit tests that "ensure" this change is genuine and won't be reverted by mistake at a later time.

[codecov]

Codecov Report

Base: 85.16% // Head: 85.16% // No change to project coverage 👍

Coverage data is based on head (a01dc37) compared to base (3fe9ca2).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head a01dc37 differs from pull request most recent head f13c7fb. Consider uploading reports for the commit f13c7fb to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1406   +/-   ##
=======================================
  Coverage   85.16%   85.16%           
=======================================
  Files          19       19           
  Lines        3620     3620           
=======================================
  Hits         3083     3083           
  Misses        459      459           
  Partials       78       78           

Impacted Files	Coverage Δ
packages.go	89.09% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[sdghchj]

Please add unit tests that "ensure" this change is genuine and won't be reverted by mistake at a later time.

No need actually, it has already been covered by tests.

But, here we have to discuss, if a const with comment like

type Type string
const Teacher Type = "teacher" //// teacher

whether the invalid comment is teacher or // teacher ?

Maybe TrimPrefix and TrimSuffix are more accurate than TrimLeft and TrimRight.

The standard lib has provide a method to extract the comment text, but with a \n at the end.

func (g *CommentGroup) Text() string{
  ...
}