The Diff Match and Patch libraries offer robust algorithms to perform the operations required for synchronizing plain text.

• Diff: Compare two blocks of plain text and efficiently return a list of differences.
• Match: Given a search string, find its best fuzzy match in a block of plain text. Weighted for both accuracy and location.
• Patch: Apply a list of patches onto plain text. Use best-effort to apply patch even when the underlying text doesn't match.