patch 8.2.3696: Vim9: error for invalid assignment when skipping

Problem:    Vim9: error for invalid assignment when skipping.
Solution:   Do not check white space when skipping. (closes #9243)
diff --git a/src/testdir/test_vim9_assign.vim b/src/testdir/test_vim9_assign.vim
index df8f486..394dfe6 100644
--- a/src/testdir/test_vim9_assign.vim
+++ b/src/testdir/test_vim9_assign.vim
@@ -1854,6 +1854,12 @@
     'var ll = [1, 2]',
     'unlet ll[0: 1]',
     ], 'E1004:', 2)
+  # command recognized as assignment when skipping, should not give an error
+  CheckScriptSuccess([
+    'vim9script',
+    'for i in []',
+    "  put =''",
+    'endfor'])
 
   CheckDefFailure([
     'var ll = [1, 2]',