Signed-off-by: Jiang Xin <worldhello....@gmail.com>
---
 Documentation/git-clean.txt | 70 ++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 63 insertions(+), 7 deletions(-)

diff --git a/Documentation/git-clean.txt b/Documentation/git-clean.txt
index f5572..56d60 100644
--- a/Documentation/git-clean.txt
+++ b/Documentation/git-clean.txt
@@ -39,13 +39,8 @@ OPTIONS
 
 -i::
 --interactive::
-       Show what would be done and the user must confirm before actually
-       cleaning. In the confirmation dialog, the user can choose to abort
-       the cleaning, or enter into an edit mode. In the edit mode, the
-       user can input space-separated patterns (the same syntax as
-       gitignore), and each clean candidate that matches with one of the
-       patterns will be excluded from cleaning. When the user feels it's
-       OK, presses ENTER and back to the confirmation dialog.
+       Show what would be done and clean files interactively. See
+       ``Interactive mode`` for details.
 
 -n::
 --dry-run::
@@ -74,6 +69,67 @@ OPTIONS
        Remove only files ignored by Git.  This may be useful to rebuild
        everything from scratch, but keep manually created files.
 
+Interactive mode
+----------------
+When the command enters the interactive mode, it shows the
+files and directories to be cleaned, and goes into its
+interactive command loop.
+
+The command loop shows the list of subcommands available, and
+gives a prompt "What now> ".  In general, when the prompt ends
+with a single '>', you can pick only one of the choices given
+and type return, like this:
+
+------------
+    *** Commands ***
+      1: clean             2: edit by patterns   3: edit by numbers
+      4. rm -i             5. quit               6. help
+    What now> 2
+------------
+
+You also could say `c` or `clean` above as long as the choice is unique.
+
+The main command loop has 6 subcommands.
+
+clean::
+
+   Start cleaning files and directories, and then quit.
+
+edit by patterns::
+
+   This shows the files and directories to be deleted and issues an
+   "Input ignore patterns>>" prompt. You can input a space-seperated
+   patterns to exclude files and directories from deletion.
+   E.g. "*.c *.h" will excludes files end with ".c" and ".h" from
+   deletion. When you are satisfied with the filtered result, press
+   ENTER (empty) back to the main menu.
+
+edit by numbers::
+
+   This shows the files and directories to be deleted and issues an
+   "Select items to delete>>" prompt. When the prompt ends with double
+   '>>' like this, you can make more than one selection, concatenated
+   with whitespace or comma.  Also you can say ranges.  E.g. "2-5 7,9"
+   to choose 2,3,4,5,7,9 from the list.  If the second number in a
+   range is omitted, all remaining patches are taken.  E.g. "7-" to
+   choose 7,8,9 from the list.  You can say '*' to choose everything.
+   Also when you are satisfied with the filtered result, press ENTER
+   (empty) back to the main menu.
+
+rm -i::
+
+  This will show a "rm -i" style cleaning, that you must confirm one
+  by one in order to delete items. This action is not as efficient
+  as the above two actions.
+
+quit::
+
+  This lets you quit without do cleaning.
+
+help::
+
+  Show brief usage of interactive git-clean.
+
 SEE ALSO
 --------
 linkgit:gitignore[5]
-- 
1.8.3.rc1.338.gb35aa5d

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