patch 8.0.1482: using feedkeys() does not work to test completion

Problem:    Using feedkeys() does not work to test Insert mode completion.
            (Lifepillar)
Solution:   Do not check for typed keys when executing :normal or feedkeys().
            Fix thesaurus completion not working when 'complete' is empty.
diff --git a/src/testdir/test_edit.vim b/src/testdir/test_edit.vim
index f857516..7278bcd 100644
--- a/src/testdir/test_edit.vim
+++ b/src/testdir/test_edit.vim
@@ -631,11 +631,11 @@
   call feedkeys("cct\<c-x>\<c-l>\<c-n>\<esc>", 'tnix')
   call assert_equal(['one', 'two', 'three', 't', '', '', ''], getline(1, '$'))
   call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<esc>", 'tnix')
-  call assert_equal(['one', 'two', 'three', 't', '', '', ''], getline(1, '$'))
-  call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<c-n>\<esc>", 'tnix')
   call assert_equal(['one', 'two', 'three', 'two', '', '', ''], getline(1, '$'))
-  call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<c-n>\<c-n>\<esc>", 'tnix')
+  call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<c-n>\<esc>", 'tnix')
   call assert_equal(['one', 'two', 'three', 'three', '', '', ''], getline(1, '$'))
+  call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<c-n>\<c-n>\<esc>", 'tnix')
+  call assert_equal(['one', 'two', 'three', 't', '', '', ''], getline(1, '$'))
   call feedkeys("cct\<c-x>\<c-l>\<c-p>\<esc>", 'tnix')
   call assert_equal(['one', 'two', 'three', 'two', '', '', ''], getline(1, '$'))
   call feedkeys("cct\<c-x>\<c-l>\<c-p>\<c-p>\<esc>", 'tnix')
@@ -1357,7 +1357,6 @@
   let save_columns = &columns
   " Need at least about 1100 columns to reproduce the problem.
   set columns=2000
-  call assert_equal(2000, &columns)
   set noswapfile
 
   let longfilename = longdirname . '/' . repeat('a', 255)