Fix warnings and typo in NestedResource

[vasuadari]

No description provided.

[brandur-stripe]

Leaving this one for you @ob-stripe, since I think you wrote most of this. The new block indentation style is different, but not necessarily better — IMO, it'd be fair to ask for a revert on all of that.

[ob-stripe]

Thanks for the contribution @vasuadari. Out of curiosity, what warnings does this fix?

[vasuadari]

@ob-stripe These are the warnings.

~/stripe-ruby/lib/stripe/api_operations/nested_resource.rb:34: warning: mismatched indentations at 'end' with 'do' at 30
~/stripe-ruby/lib/stripe/api_operations/nested_resource.rb:41: warning: mismatched indentations at 'end' with 'do' at 37
~/stripe-ruby/lib/stripe/api_operations/nested_resource.rb:48: warning: mismatched indentations at 'end' with 'do' at 44
~/stripe-ruby/lib/stripe/api_operations/nested_resource.rb:55: warning: mismatched indentations at 'end' with 'do' at 51
~/stripe-ruby/lib/stripe/api_operations/nested_resource.rb:62: warning: mismatched indentations at 'end' with 'do' at 58

[ob-stripe]

Just merged this. Thanks again!