+# we don't support -C as an alias for --find-copies since it's already
+# used for chdir
+our @diff_opt = qw(unified|U=i output-indicator-new=s output-indicator-old=s
+ output-indicator-context=s indent-heuristic!
+ minimal patience histogram anchored=s@ diff-algorithm=s
+ color-moved:s color-moved-ws=s no-color-moved no-color-moved-ws
+ word-diff:s word-diff-regex=s color-words:s no-renames
+ rename-empty! check ws-error-highlight=s full-index binary
+ abbrev:i break-rewrites|B:s find-renames|M:s find-copies:s
+ find-copies-harder irreversible-delete|D l=i diff-filter=s
+ S=s G=s find-object=s pickaxe-all pickaxe-regex O=s R
+ relative:s text|a ignore-cr-at-eol ignore-space-at-eol
+ ignore-space-change|b ignore-all-space|w ignore-blank-lines
+ inter-hunk-context=i function-context|W exit-code ext-diff
+ no-ext-diff textconv! src-prefix=s dst-prefix=s no-prefix
+ line-prefix=s);
+