Module diff 

Diff preview controls for file operations

Constants

CONTEXT_RADIUS

Number of context lines to include around changes in unified diff output

HEAD_LINE_COUNT

Number of leading diff lines to retain when condensing previews

MAX_PREVIEW_BYTES

Maximum number of bytes allowed in diff preview inputs

MAX_PREVIEW_LINES

Maximum number of diff lines to keep in preview output before condensation

TAIL_LINE_COUNT

Number of trailing diff lines to retain when condensing previews