Not implemented Instead of showing the full 40-byte hexadecimal object name in diff-raw format output and diff-tree header lines, show only a partial prefix. This is independent of the `--full-index` option above, which controls the diff-patch output format. Non default number of digits can be specified with `--abbrev=`.

Not implemented Add an arbitrary header to the email headers. This is in addition to any configured headers, and may be used multiple times. For example, `--add-header="Organization: git-foo"`

Not implemented Create multipart/mixed attachment, the first part of which is the commit message and the patch itself in the second part, with `Content-Disposition: attachment`.

Not implemented Break complete rewrite changes into pairs of delete and create.

Not implemented In addition to `--full-index`, output a binary diff that can be applied with `git-apply`.

Not implemented Detect copies as well as renames. See also `--find-copies-harder`.

Not implemented Add a `Cc:` header to the email headers. This is in addition to any configured headers, and may be used multiple times.

Not implemented ifndef::git-format-patch[] Warn if changes introduce trailing whitespace or an indent that uses a space before a tab. Exits with non-zero status if problems are found. Not compatible with --exit-code. endif::git-format-patch[]

Not implemented Show colored diff.

Not implemented Show colored word diff, i.e., color words which have changed. By default, words are separated by whitespace. + When a is specified, every non-overlapping match of the considered whitespace and ignored(!) for the purposes of finding differences. You may want to append `|[^[:space:]]` to your regular expression to make sure that it matches all non-whitespace characters. A match that contains a newline is silently truncated(!) at the newline. + The regex can also be set via a diff driver or configuration option, see linkgit:gitattributes[1] or linkgit:git-config[1]. Giving it explicitly overrides any diff driver or configuration setting. Diff drivers override configuration settings. endif::git-format-patch[]

Not implemented In addition to the patches, generate a cover letter file containing the shortlog and the overall diffstat. You can fill in a description in the file before sending it out.

Not implemented ifndef::git-format-patch[] Select only files that are Added (`A`), Copied (`C`), Deleted (`D`), Modified (`M`), Renamed (`R`), have their type (i.e. regular file, symlink, submodule, ...) changed (`T`), are Unmerged (`U`), are Unknown (`X`), or have had their pairing Broken (`B`). Any combination of the filter characters may be used. When `*` (All-or-none) is added to the combination, all paths are selected if there is any file that matches other criteria in the comparison; if there is no file that matches other criteria, nothing is selected. endif::git-format-patch[]

Not implemented Output the distribution of relative amount of changes (number of lines added or removed) for each sub-directory. Directories with changes below a cut-off percent (3% by default) are not shown. The cut-off percent can be set with `--dirstat=limit`. Changes in a child directory is not counted for the parent directory, unless `--cumulative` is used.

Not implemented Same as `--dirstat`, but counts changed files instead of lines.

Not implemented Show the given destination prefix instead of "b/".

Not implemented ifndef::git-format-patch[] Make the program exit with codes similar to diff(1). That is, it exits with 1 if there were differences and 0 means no differences.

Not implemented Allow an external diff helper to be executed. If you set an external diff driver with linkgit:gitattributes[5], you need to use this option with linkgit:git-log[1] and friends.

Not implemented For performance reasons, by default, `-C` option finds copies only if the original file of the copy was modified in the same changeset. This flag makes the command inspect unmodified files as candidates for the source of copy. This is a very expensive operation for large projects, so use it with caution. Giving more than one `-C` option has the same effect.

Not implemented Instead of the first handful of characters, show the full pre- and post-image blob object names on the "index" line when generating patch format output.

Not implemented Ignore whitespace when comparing lines. This ignores differences even if one line has whitespace where the other line has none.

Not implemented Do not include a patch that matches a commit in ... This will examine all patches reachable from but not from and compare them with the patches being generated, and any patch that matches is ignored.

Not implemented Ignore changes in whitespace at EOL.

Not implemented Ignore changes in amount of whitespace. This ignores whitespace at line end, and considers all other sequences of one or more whitespace characters to be equivalent.

Not implemented Ignore changes to submodules in the diff generation.

Not implemented Create multipart/mixed attachment, the first part of which is the commit message and the patch itself in the second part, with `Content-Disposition: inline`.

Not implemented Make the first mail (or all the mails with `--no-thread`) appear as a reply to the given Message-Id, which avoids breaking threads to provide a new patch series.

Not implemented Show the context between diff hunks, up to the specified number of lines, thereby fusing hunks that are close to each other.

Not implemented Do not strip/add '[PATCH]' from the first line of the commit log message.

Not implemented The `-M` and `-C` options require O(n^2) processing time where n is the number of potential rename/copy targets. This option prevents rename/copy detection from running if the number of rename/copy targets exceeds the specified number.

Not implemented Detect renames.

Not implemented Show only names of changed files.

Not implemented Show only names and status of changed files. See the description of the `--diff-filter` option on what the status letters mean.

Not implemented Disable the creation of an attachment, overriding the configuration setting.

Not implemented Do not output contents of changes in binary files, instead display a notice that those files changed. Patches generated using this option cannot be applied properly, but they are still useful for code review.

Not implemented Turn off colored diff, even when the configuration file gives the default to color output.

Not implemented Disallow external diff drivers.

Not implemented Name output in '[PATCH]' format.

Not implemented Do not show any source or destination prefix.

Not implemented Turn off rename detection, even when the configuration file gives the default to do so.

Not implemented ifdef::git-format-patch[] Generate plain patches without any diffstats. endif::git-format-patch[]

Not implemented Controls addition of `In-Reply-To` and `References` headers to make the second and subsequent mails appear as replies to the first. Also controls generation of the `Message-Id` header to reference. + The optional