updated for version 7.3.444

Problem:    ":all!" and ":sall!" give error E477, even though the
            documentation says these are valid commands.
Solution:   Support the exclamation mark. (Hirohito Higashi)

src/testdir/test31.in

@@ -63,6 +63,12 @@ A 3:close
 :" write "testtext 1"
 A 3:close!
 :w >>test.out
+:set nohidden
+:" test ":all!" hides changed buffer; write "testtext 2 2 2"
+:sp Xtest4
+GA 4:all!
+:1wincmd w
+:w >>test.out
 :qa!
 ENDTEST
 

src/testdir/test31.ok

@@ -9,3 +9,4 @@ testtext 3 3
 testtext 1
 testtext 3 3 3
 testtext 1
+testtext 2 2 2