Fix docs (#83)

[dodie]

• fix formatting
• fix copy-paste error in the docs of @Examples

[coveralls]

Pull Request Test Coverage Report for Build 424

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 5 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.1%) to 70.976%

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Files with Coverage Reduction	New Missed Lines	%
airline-core/src/main/java/com/github/rvesse/airline/parser/aliases/AliasResolver.java	1	97.14%
airline-core/src/main/java/com/github/rvesse/airline/model/MetadataLoader.java	1	91.67%
airline-core/src/main/java/com/github/rvesse/airline/parser/options/StandardOptionParser.java	1	90.0%
airline-core/src/main/java/com/github/rvesse/airline/parser/options/ListValueOptionParser.java	2	75.61%
<!--	Total:	5		-->

Totals
Change from base Build 420:	0.1%
Covered Lines:	4996
Relevant Lines:	7039

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💛 - Coveralls

[rvesse]

Thanks for the contribution, much appreciated