The "/fdiff" page:

URL: fdiff?v1=HASH&v2=HASH

Two arguments, v1 and v2, identify the artifacts to be diffed. Show diff side by side unless sbs is 0. Generate plain text if "patch" is present, otherwise generate "pretty" HTML.

Alternative URL: fdiff?from=filename1&to=filename2&ci=checkin

If the "from" and "to" query parameters are both present, then they are the names of two files within the check-in "ci" that are diffed. If the "ci" parameter is omitted, then the most recent check-in ("tip") is used.

Additional parameters:

dc=N

Show N lines of context around each diff

patch

Use the patch diff format

regex=REGEX

Only show differences that match REGEX

sbs=BOOLEAN

Turn side-by-side diffs on and off (default: on)

verbose=BOOLEAN

Show more detail when describing artifacts

w=BOOLEAN

Ignore whitespace