Fix missing literal token in some cases

[tvso]

PR Details

Fix missing literal token in some cases

How Has This Been Tested

Add new unit tests for this, and correction existing test cases.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #9 (dd69404) into main (dc951e3) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main        #9   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines          465       465           
=========================================
  Hits           465       465           

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
nfp.go	100.00% <100.00%> (ø)

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[xuri]

LGTM, thanks for your contribution.