git-gui: Reimplement and enhance auto-selection of diffs.

diff --git a/lib/index.tcl b/lib/index.tcl
index d011406462b6f2ad3c83aba90612dd1d6628f385..b045219a1cca6bf46218bf211c0c88b8d699e144 100644 (file)
--- a/lib/index.tcl
+++ b/lib/index.tcl
@@ -164,6 +164,7 @@ proc write_update_index {fd pathList totalCnt batch after} {
                _O -
                AM {set new A_}
                _T {set new T_}
+               _U -
                U? {
                        if {[file exists $path]} {
                                set new M_