[PATCH v3] range-diff: update stale summary of --no-dual-color

[Kyle Meyer]

275267937b (range-diff: make dual-color the default mode, 2018-08-13)
replaced --dual-color with --no-dual-color but left the option's
summary untouched.  Rewrite the summary to describe --no-dual-color
rather than dual-color.

Helped-by: Jonathan Nieder <jrnie...@gmail.com>
Helped-by: Johannes Schindelin <johannes.schinde...@gmx.de>
Signed-off-by: Kyle Meyer <k...@kyleam.com>
---
 builtin/range-diff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/range-diff.c b/builtin/range-diff.c
index f52d45d9d6..0aa9bed41f 100644
--- a/builtin/range-diff.c
+++ b/builtin/range-diff.c
@@ -25,7 +25,7 @@ int cmd_range_diff(int argc, const char **argv, const char 
*prefix)
                OPT_INTEGER(0, "creation-factor", &creation_factor,
                            N_("Percentage by which creation is weighted")),
                OPT_BOOL(0, "no-dual-color", &simple_color,
-                           N_("color both diff and diff-between-diffs")),
+                           N_("use simple diff colors")),
                OPT_END()
        };
        int i, j, res = 0;
-- 
2.18.0