Function unified_diff 

pub fn unified_diff(
    old_content: &str,
    new_content: &str,
    old_path: &str,
    new_path: &str,
    context_lines: usize,
) -> String

Generate a unified diff patch for two blobs.

Parameters

• old_content — the old file content (empty for added files).
• new_content — the new file content (empty for deleted files).
• old_path — display path for the old side.
• new_path — display path for the new side.
• context_lines — number of context lines around changes (default: 3).

Returns

The unified diff as a string.