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_digraph.vim b/src/testdir/test_digraph.vim
index 4aed403..3312faf 100644
--- a/src/testdir/test_digraph.vim
+++ b/src/testdir/test_digraph.vim
@@ -595,13 +595,13 @@
   call digraph_setlist([['aa', 'き'], ['bb', 'く']])
 
   for pair in digraph_getlist(1)
-    call assert_equal(digraph_get(pair[0]), pair[1])
+    call assert_equal(pair[1], digraph_get(pair[0]))
   endfor
 
   " We don't know how many digraphs are registered before, so check the number
   " of digraphs returned.
   call assert_equal(digraph_getlist()->len(), digraph_getlist(0)->len())
-  call assert_notequal((digraph_getlist()->len()), digraph_getlist(1)->len())
+  call assert_notequal(digraph_getlist()->len(), digraph_getlist(1)->len())
 
   call assert_fails('call digraph_getlist(0z12)', 'E974: Using a Blob as a Number')
 endfunc