config: Introduce diff.algorithm variable

diff --git a/Documentation/diff-config.txt b/Documentation/diff-config.txt
index 67a90a828c04b7277fc603c6518fd0ecd8247d32..b8a8724f6f87fdc820f0d686078e0466adbad204 100644 (file)
--- a/Documentation/diff-config.txt
+++ b/Documentation/diff-config.txt
@@ -56,6 +56,10 @@ diff.statGraphWidth::
        Limit the width of the graph part in --stat output. If set, applies
        to all commands generating --stat output except format-patch.
 
+diff.context::
+       Generate diffs with <n> lines of context instead of the default
+       of 3. This value is overridden by the -U option.
+
 diff.external::
        If this config variable is set, diff generation is not
        performed using the internal diff machinery, but using the
@@ -103,6 +107,19 @@ diff.suppressBlankEmpty::
        A boolean to inhibit the standard behavior of printing a space
        before each empty output line. Defaults to false.
 
+diff.submodule::
+       Specify the format in which differences in submodules are
+       shown.  The "log" format lists the commits in the range like
+       linkgit:git-submodule[1] `summary` does.  The "short" format
+       format just shows the names of the commits at the beginning
+       and end of the range.  Defaults to short.
+
+diff.wordRegex::
+       A POSIX Extended Regular Expression used to determine what is a "word"
+       when performing word-by-word difference calculations.  Character
+       sequences that match the regular expression are "words", all other
+       characters are *ignorable* whitespace.
+
 diff.<driver>.command::
        The custom diff driver command.  See linkgit:gitattributes[5]
        for details.
@@ -138,3 +155,20 @@ diff.tool::
        "kompare".  Any other value is treated as a custom diff tool,
        and there must be a corresponding `difftool.<tool>.cmd`
        option.
+
+diff.algorithm::
+       Choose a diff algorithm.  The variants are as follows:
++
+--
+`default`, `myers`;;
+       The basic greedy diff algorithm. Currently, this is the default.
+`minimal`;;
+       Spend extra time to make sure the smallest possible diff is
+       produced.
+`patience`;;
+       Use "patience diff" algorithm when generating patches.
+`histogram`;;
+       This algorithm extends the patience algorithm to "support
+       low-occurrence common elements".
+--
++