[PATCH 1/2] RelNotes/2.21: tweak "--date=auto" mention

[Jeff King <peff@peff.net>]

In the feature that was eventually committed, "--date=auto" doesn't do
anything. It was generalized to "--date=auto:<format>".

Signed-off-by: Jeff King <peff@peff.net>
---
 Documentation/RelNotes/2.21.0.txt | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/RelNotes/2.21.0.txt b/Documentation/RelNotes/2.21.0.txt
index 8a9a8dd496..77b8d9d221 100644
--- a/Documentation/RelNotes/2.21.0.txt
+++ b/Documentation/RelNotes/2.21.0.txt
@@ -77,9 +77,9 @@ UI, Workflows & Features
 
  * A new date format "--date=human" that morphs its output depending
    on how far the time is from the current time has been introduced.
-   "--date=auto" can be used to use this new format when the output is
-   going to the pager or to the terminal and otherwise the default
-   format.
+   "--date=auto:human" can be used to use this new format (or any
+   existing format) when the output is going to the pager or to the
+   terminal, and otherwise the default format.
 
 
 Performance, Internal Implementation, Development Support etc.
-- 
2.21.0.rc0.568.gbf84974d35