patch 9.1.1559: tests: Test_popup_complete_info_01() fails when run alone

Problem:  tests: Test_popup_complete_info_01() fails when run alone.
Solution: Set buffer-local competeopt+=noinsert and add missing cleanup
          in Test_popup_complete() (zeertzjq).

closes: #17773

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: zeertzjq

src/testdir/test_popup.vim

@@ -214,6 +214,8 @@ func Test_popup_complete()
   call feedkeys("aM\<f5>\<enter>\<esc>", 'tx')
   call assert_equal(["March", "M", "March"], getline(1,4))
   %d
+
+  set completeopt&
 endfunc
 
 
@@ -1078,6 +1080,7 @@ func Test_popup_complete_info_01()
   setlocal thesaurus=Xdummy.txt
   setlocal omnifunc=syntaxcomplete#Complete
   setlocal completefunc=syntaxcomplete#Complete
+  setlocal completeopt+=noinsert
   setlocal spell
   for [keys, mode_name] in [
         \ ["", ''],

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1559,
 /**/
     1558,
 /**/