hgweb: add a "patch" query parameter to filelog command Add support for a "patch" query parameter in filelog web command similar to --patch option of `hg log` to display the diff of each changeset in the table of revisions. The diff text is displayed in a dedicated row of the table that follows the existing one for each entry and spans over all columns. Only update "paper" template in this patch.

hgweb: handle "parity" internally in webutil.diffs() There's apparently no reason to have the "parity" of diff blocks that webutil.diffs() generates coming from outside the function. So have it internally managed. We thus now pass a "web" object to webutil.diffs() to get access to both "repo" and "stripecount" attribute.

largefiles: add lfile argument to updatestandin() for efficiency (API) Before this patch, updatestandin() takes "standin" argument, and applies splitstandin() on it to pick out a path to largefile (aka "lfile" or so) from standin. But in fact, all callers already knows "lfile". In addition to it, many callers knows both "standin" and "lfile". Therefore, making updatestandin() take only one of "standin" or "lfile" is inefficient.

largefiles: use strip() instead of slicing to get rid of EOL of standin This slicing prevents from replacing SHA-1 by another (= longer hash value) in the future.