git update-index x
-cat << EOF > x
+tr '_' ' ' << EOF > x
whitespace at beginning
whitespace change
white space in the middle
-whitespace at end
+whitespace at end__
unchanged line
CR at end
EOF
-tr 'Q' '\015' << EOF > expect
+tr 'Q_' '\015 ' << EOF > expect
diff --git a/x b/x
index d99af23..8b32fb5 100644
--- a/x
+ whitespace at beginning
+whitespace change
+white space in the middle
-+whitespace at end
++whitespace at end__
unchanged line
-CR at endQ
+CR at end