test(util): improve test coverage for util/print-util.go to 100%

[yuvraj-kolkar17]

Description

Added complete test suite for print-util.go achieving 100% code coverage.
Implemented tests for Printf, Fatalf functions and Unicode constants with
proper output verification and edge case handling.

Part of the issue #46

How Has This Been Tested?

Test Commands

# Run tests with coverage profile
go test -v -coverprofile="coverage.out" .

# Check coverage percentage
go test -cover .

After the Coverage

Checklist:

• The title of the PR states what changed and the related issues number (used for the release note).
• Does this PR requires documentation updates?
• I've updated documentation as required by this PR.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have tested it for all user roles.
• I have added all the required unit test cases.

Does this PR introduce a breaking change?

[yuvraj-kolkar17]

PTAL @priyupadhyay @narmidm @Rahul-D78 @gourishkb

[Alokzh]

@yuvraj-kolkar17 There is already an open PR for print-util.go

[yuvraj-kolkar17]

@yuvraj-kolkar17 There is already an open PR for print-util.go

Thanks for pointing that out, @Alokzh.
But I'm aware of the existing PR #72 for print-util.go, but it currently covers only ~43% of the code (as shown below).
This PR #89 adds tests for the remaining untested parts to improve overall coverage.
Appreciate your response!

[gourishkb]

LGTM, thanks @yuvraj-kolkar17