patch 9.1.1968: tests: test_python3.vim leaves swapfiles behind

Problem:  tests: test_python3.vim leaves swapfiles behind
Solution: Close open buffers using :bw! instead of :close!

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

src/testdir/test_python3.vim

@@ -518,7 +518,7 @@ func Test_python3_range2()
   call AssertException(["let x = py3eval('r.abc')"],
         \ "Vim(let):AttributeError: 'vim.range' object has no attribute 'abc'")
 
-  close!
+  bw!
 endfunc
 
 " Test for the python tabpage object
@@ -995,7 +995,7 @@ func Test_python3_lockedvar()
 
   call assert_equal([0, 1, 2, 3], l)
   unlockvar! l
-  close!
+  bw!
 endfunc
 
 " Test for calling a function
@@ -1024,7 +1024,7 @@ func Test_python3_function_call()
   delfunction New
   py3 ee('f(1, 2, 3)')
   call assert_equal("f(1, 2, 3):(<class 'vim.error'>, error('Vim:E117: Unknown function: New',))", getline(2))
-  close!
+  bw!
   delfunction DictNew
 endfunc
 
@@ -2927,7 +2927,7 @@ func Test_python3_chdir()
   EOF
   call assert_equal(["b'testdir'", 'Xp3cdfile', "b'src'", 'testdir/Xp3cdfile',
         \"b'testdir'", 'Xp3cdfile'], getline(2, '$'))
-  close!
+  bw!
   call AssertException(["py3 vim.chdir(None)"], "Vim(py3):TypeError:")
 endfunc
 
@@ -4139,7 +4139,7 @@ func Test_python3_errors()
   for i in range(n_expected > n_actual ? n_expected : n_actual)
     call assert_equal(i >= n_expected ? '' : expected[i], i >= n_actual ? '' : actual[i])
   endfor
-  close!
+  bw!
 endfunc
 
 " Test import
@@ -4195,7 +4195,7 @@ func Test_python3_import()
     pythonx/topmodule/submodule/subsubmodule/subsubsubmodule.py
   END
   call assert_equal(expected, getline(2, '$'))
-  close!
+  bw!
 
   " Try to import a non-existing module with a dot (.)
   call AssertException(['py3 import a.b.c'], "No module named 'a'")
@@ -4233,7 +4233,7 @@ func Test_python3_exception()
     vim.bindeval("Exe('xxx_non_existent_command_xxx')"):(<class 'vim.error'>, error('Vim:E492: Not an editor command: xxx_non_existent_command_xxx',))
   END
   call assert_equal(expected, getline(2, '$'))
-  close!
+  bw!
 endfunc
 
 " Regression: interrupting vim.command propagates to next vim.command
@@ -4277,7 +4277,7 @@ func Test_python3_keyboard_interrupt()
   END
   call assert_equal(expected, getline(2, '$'))
   call assert_equal('', output)
-  close!
+  bw!
 endfunc
 
 " Regression: Iterator for a Vim object should hold a reference.

src/version.c

@@ -729,6 +729,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1968,
 /**/
     1967,
 /**/