Simplify Analyzer.ignore by reducing nesting

[alexandear]

This PR is intended to increase readability and maintainability of the Analyzer.ignore unexported function.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 94.11765% with 3 lines in your changes missing coverage. Please review.

Project coverage is 66.62%. Comparing base (1216c9b) to head (cdfb9a7).
Report is 23 commits behind head on master.

Files with missing lines	Patch %	Lines
analyzer.go	94.11%	2 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1269      +/-   ##
==========================================
- Coverage   68.49%   66.62%   -1.88%     
==========================================
  Files          75       75              
  Lines        4384     5190     +806     
==========================================
+ Hits         3003     3458     +455     
- Misses       1233     1583     +350     
- Partials      148      149       +1     

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