Suppress warning about IO#lines in Ruby 2.0

[tricknotes]

• actionpack/lib/action_dispatch/middleware/exception_wrapper.rb:99: IO#lines is deprecated; use #each_line instead

[goshacmd]

👍

[goshacmd]

rails(master)$ ack \\.lines
actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
99:          lines = file.lines.drop(start).take(6)

actionpack/test/dispatch/debug_exceptions_test.rb
172:    assert_operator((output.rewind && output.read).lines.count, :>, 10)

guides/source/active_support_core_extensions.md
2239:invoice.lines.to_formatted_s(:db) # => "23,567,556,12"

Can you please change the rest two occurrences of lines as well?

[tricknotes]

Thank you for your review @goshakkk

But I cannot because of the following reasons:

actionpack/test/dispatch/debug_exceptions_test.rb
172: assert_operator((output.rewind && output.read).lines.count, :>, 10)

This method is String#lines. It is not deprecated.

guides/source/active_support_core_extensions.md
2239:invoice.lines.to_formatted_s(:db) # => "23,567,556,12"

This method is probably Array#lines. It is not deprecated too.

[goshacmd]

Sorry, my bad.