tag.c: implement '--format' option

diff --git a/Documentation/pretty-options.txt b/Documentation/pretty-options.txt
index 74aa01a0ec27b6cc0fbb9763b8e583a3f996da25..642af6e42684602f5465fc3c61d83ca6309b34cb 100644 (file)
--- a/Documentation/pretty-options.txt
+++ b/Documentation/pretty-options.txt
@@ -37,7 +37,10 @@ people using 80-column terminals.
        in their encoding header; this option can be used to tell the
        command to re-code the commit log message in the encoding
        preferred by the user.  For non plumbing commands this
-       defaults to UTF-8.
+       defaults to UTF-8. Note that if an object claims to be encoded
+       in `X` and we are outputting in `X`, we will output the object
+       verbatim; this means that invalid sequences in the original
+       commit may be copied to the output.
 
 --notes[=<ref>]::
        Show the notes (see linkgit:git-notes[1]) that annotate the