patch 9.1.1121: Enter does not insert newline with "noselect"

Problem:  Enter does not insert newline with "noselect" when the pum is
          visible (lifepillar)
Solution: When Enter is pressed and no complete-item is selected,
          ins_compl_prep returns false, and the edit function continues
          processing Enter to insert a new line. (glepnir)

fixes: #1653
closes: #16653

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_edit.vim b/src/testdir/test_edit.vim
index 1665330..9ce8bb2 100644
--- a/src/testdir/test_edit.vim
+++ b/src/testdir/test_edit.vim
@@ -198,7 +198,7 @@
     endif
   endfu
   au InsertCharPre <buffer> :call DoIt()
-  call feedkeys("A\<f5>\<c-p>u\<cr>\<c-l>\<cr>", 'tx')
+  call feedkeys("A\<f5>\<c-p>u\<C-Y>\<c-l>\<cr>", 'tx')
   call assert_equal(["Jan\<c-l>",''], 1->getline('$'))
   %d
   call setline(1, 'J')
@@ -594,7 +594,7 @@
   call assert_equal([include, 'two', ''], getline(1, '$'))
   call feedkeys("2ggC\<c-x>\<tab>\<down>\<down>\<cr>\<esc>", 'tnix')
   call assert_equal([include, 'three', ''], getline(1, '$'))
-  call feedkeys("2ggC\<c-x>\<tab>\<down>\<down>\<down>\<cr>\<esc>", 'tnix')
+  call feedkeys("2ggC\<c-x>\<tab>\<down>\<down>\<down>\<C-y>\<esc>", 'tnix')
   call assert_equal([include, '', ''], getline(1, '$'))
   bw!
 endfunc
@@ -622,7 +622,7 @@
   %d
   call setline(1, 'A')
   call cursor(1, 1)
-  call feedkeys("A\<c-x>\<c-k>\<down>\<down>\<down>\<cr>\<esc>", 'tnix')
+  call feedkeys("A\<c-x>\<c-k>\<down>\<down>\<down>\<C-Y>\<esc>", 'tnix')
   call assert_equal(['A'], getline(1, '$'))
   %d
   call setline(1, 'A')
@@ -2293,4 +2293,15 @@
   set smarttab&
 endfunc
 
+func Test_edit_CAR()
+  set cot=menu,menuone,noselect
+  new
+
+  call feedkeys("Shello hero\<CR>h\<C-x>\<C-N>e\<CR>", 'tx')
+  call assert_equal(['hello hero', 'he', ''], getline(1, '$'))
+
+  bw!
+  set cot&
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab