[ARROW-6228] [C++] Add context lines to Diff formatting

• Type: New Feature
• Status: Open
• Priority: Trivial
• Resolution: Unresolved
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/22616
• Assignee: Unassigned
• Reporter: Ben Kietzman
• Created: 13/Aug/19 16:04
• Updated: 11/Jan/23 07:45

Description

Diff currently renders only inserted or deleted elements, but context lines can be helpful to viewers of the diff. Add an option for configurable context line count to Diff and EqualOptions