tests: Migrate legacy test argument_0count.

src/nvim/testdir/Makefile

@@ -30,7 +30,6 @@ SCRIPTS := test_eval.out                                               \
            test_argument_count.out                                     \
            test_close_count.out                                        \
            test_command_count.out                                      \
-           test_argument_0count.out
 
 SCRIPTS_GUI := test16.out
 

src/nvim/testdir/test_argument_0count.in

@@ -1,28 +0,0 @@
-Tests for :0argadd and :0argedit     vim: set ft=vim :
-
-STARTTEST
-:so small.vim
-:let arglists = []
-:%argd
-:arga a b c d
-:2argu
-:0arga added
-:call add(arglists, argv())
-:2argu
-:arga third
-:call add(arglists, argv())
-:%argd
-:arga a b c d
-:2argu
-:0arge edited
-:call add(arglists, argv())
-:2argu
-:arga third
-:call add(arglists, argv())
-:e! test.out
-:call append(0, map(copy(arglists), 'join(v:val, " ")'))
-:w
-:qa!
-ENDTEST
-
-

src/nvim/testdir/test_argument_0count.ok

@@ -1,5 +0,0 @@
-added a b c d
-added a third b c d
-edited a b c d
-edited a third b c d
-