fix: indent attribute doc

[amyXia1994]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

fix #30

2. What is the scope of this PR (e.g. component or file name):

pkg/swagger/generator/template_repo.go
pkg/swagger/generator/templates/header.gotmpl
pkg/swagger/generator/templates/introduction.gotmpl

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

fix the indentation in generated attribute doc

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

pkg/swagger/generator/template_repo_test.go

6. Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

fix the indentation in generated attribute doc

[coveralls]

Pull Request Test Coverage Report for Build 5402737827

• 11 of 11 (100.0%) changed or added relevant lines in 1 file are covered.
• 6 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.08%) to 66.781%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/swagger/generator/template_repo.go	6	63.61%

Totals
Change from base Build 5368888637:	-0.08%
Covered Lines:	1950
Relevant Lines:	2920

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💛 - Coveralls

[Peefy]

LGTM