am doc: add a pointer to relevant hooks

diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt
index e0e12e947034b3f690d7f103ee90e0bc1a21f926..11887e63a05904d95f7d07d51b818721b33c0b66 100644 (file)
--- a/Documentation/git-difftool.txt
+++ b/Documentation/git-difftool.txt
@@ -69,13 +69,14 @@ with custom merge tool commands and has the same value as `$MERGED`.
 --tool-help::
        Print a list of diff tools that may be used with `--tool`.
 
---symlinks::
---no-symlinks::
+--[no-]symlinks::
        'git difftool''s default behavior is create symlinks to the
-       working tree when run in `--dir-diff` mode.
+       working tree when run in `--dir-diff` mode and the right-hand
+       side of the comparison yields the same content as the file in
+       the working tree.
 +
-       Specifying `--no-symlinks` instructs 'git difftool' to create
-       copies instead.  `--no-symlinks` is the default on Windows.
+Specifying `--no-symlinks` instructs 'git difftool' to create copies
+instead.  `--no-symlinks` is the default on Windows.
 
 -x <command>::
 --extcmd=<command>::