patch 8.2.4676: test fails with different error

Problem:    Test fails with different error.
Solution:   Add argument for :elseif.

src/testdir/test_vimscript.vim

@@ -3025,7 +3025,7 @@ func Test_nested_if_else_errors()
 
   " :elseif without :if
   let code =<< trim END
-    elseif
+    elseif 1
   END
   call writefile(code, 'Xtest')
   call AssertException(['source Xtest'], 'Vim(elseif):E582: :elseif without :if')
@@ -3033,7 +3033,7 @@ func Test_nested_if_else_errors()
   " :elseif without :if
   let code =<< trim END
     while 1
-      elseif
+      elseif 1
     endwhile
   END
   call writefile(code, 'Xtest')
@@ -3043,7 +3043,7 @@ func Test_nested_if_else_errors()
   let code =<< trim END
     try
     finally
-      elseif
+      elseif 1
     endtry
   END
   call writefile(code, 'Xtest')
@@ -3052,7 +3052,7 @@ func Test_nested_if_else_errors()
   " :elseif without :if
   let code =<< trim END
     try
-      elseif
+      elseif 1
     endtry
   END
   call writefile(code, 'Xtest')
@@ -3063,7 +3063,7 @@ func Test_nested_if_else_errors()
     try
       throw "a"
     catch /a/
-      elseif
+      elseif 1
     endtry
   END
   call writefile(code, 'Xtest')