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-rw-r--r--Documentation/diff-options.txt24
1 files changed, 15 insertions, 9 deletions
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 32e6dee5ac..c89d530d3d 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -49,9 +49,10 @@ ifdef::git-log[]
--diff-merges=m:::
-m:::
This option makes diff output for merge commits to be shown in
- the default format. The default format could be changed using
+ the default format. `-m` will produce the output only if `-p`
+ is given as well. The default format could be changed using
`log.diffMerges` configuration parameter, which default value
- is `separate`. `-m` implies `-p`.
+ is `separate`.
+
--diff-merges=first-parent:::
--diff-merges=1:::
@@ -61,8 +62,7 @@ ifdef::git-log[]
--diff-merges=separate:::
This makes merge commits show the full diff with respect to
each of the parents. Separate log entry and diff is generated
- for each parent. This is the format that `-m` produced
- historically.
+ for each parent.
+
--diff-merges=combined:::
--diff-merges=c:::
@@ -588,11 +588,17 @@ When used together with `-B`, omit also the preimage in the deletion part
of a delete/create pair.
-l<num>::
- 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.
+ The `-M` and `-C` options involve some preliminary steps that
+ can detect subsets of renames/copies cheaply, followed by an
+ exhaustive fallback portion that compares all remaining
+ unpaired destinations to all relevant sources. (For renames,
+ only remaining unpaired sources are relevant; for copies, all
+ original sources are relevant.) For N sources and
+ destinations, this exhaustive check is O(N^2). This option
+ prevents the exhaustive portion of rename/copy detection from
+ running if the number of source/destination files involved
+ exceeds the specified number. Defaults to diff.renameLimit.
+ Note that a value of 0 is treated as unlimited.
ifndef::git-format-patch[]
--diff-filter=[(A|C|D|M|R|T|U|X|B)...[*]]::