legacy tests: migrate test104

src/nvim/testdir/sautest/autoload/Test104.vim

@@ -1 +0,0 @@
-let Test104#numvar = 123

src/nvim/testdir/test104.in

@@ -1,30 +0,0 @@
-Tests for :let.  vim: set ft=vim ts=8 :
-
-STARTTEST
-:so small.vim
-:set runtimepath+=./sautest
-:" Test to not autoload when assigning.  It causes internal error.
-:try
-:  let Test104#numvar = function('tr')
-:  $put ='OK: ' . string(Test104#numvar)
-:catch
-:  $put ='FAIL: ' . v:exception
-:endtry
-:let a = 1
-:let b = 2
-:for letargs in ['a b', '{0 == 1 ? "a" : "b"}', '{0 == 1 ? "a" : "b"} a', 'a {0 == 1 ? "a" : "b"}']
-:  try
-:    redir => messages
-:    execute 'let' letargs
-:    redir END
-:    $put ='OK:'
-:    $put =split(substitute(messages, '\n', '\0  ', 'g'), '\n')
-:  catch
-:    $put ='FAIL: ' . v:exception
-:    redir END
-:  endtry
-:endfor
-:/^Results/,$wq! test.out
-ENDTEST
-
-Results of test104:

src/nvim/testdir/test104.ok

@@ -1,13 +0,0 @@
-Results of test104:
-OK: function('tr')
-OK:
-  a                     #1
-  b                     #2
-OK:
-  b                     #2
-OK:
-  b                     #2
-  a                     #1
-OK:
-  a                     #1
-  b                     #2