The "Text Reviewer & Diff" is a sophisticated tool designed for academic text review. It enables users to provide suggestions and corrections for input texts without rewriting entire sections. The feedback is structured in a markdown table with four columns: Original Text, Revised Text, Rationale, and Diff. The Diff column is particularly noteworthy, as it visually compares the original and revised text fragments at the word level. Deleted text fragments are marked with strikethroughs, and added text fragments are highlighted in bold.