patch 9.1.0332: tests: some assert_equal() calls have wrong order of args

Problem:  tests: some assert_equal() calls have wrong order of args
Solution: Correct the order (zeertzjq).

closes: #14555

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index d4fb47b..ed8f89d 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -3733,9 +3733,9 @@
   call assert_fails("call getcompletion('', 'custom')", 'E475:')
   call assert_fails("call getcompletion('', 'customlist')", 'E475:')
 
-  call assert_equal(getcompletion('', 'custom,CustomComplete1'), ['a', 'b', 'c'])
-  call assert_equal(getcompletion('', 'customlist,CustomComplete2'), ['a', 'b'])
-  call assert_equal(getcompletion('b', 'customlist,CustomComplete2'), ['b'])
+  call assert_equal(['a', 'b', 'c'], getcompletion('', 'custom,CustomComplete1'))
+  call assert_equal(['a', 'b'], getcompletion('', 'customlist,CustomComplete2'))
+  call assert_equal(['b'], getcompletion('b', 'customlist,CustomComplete2'))
 
   delcom Test1
   delcom Test2