patch 8.0.1636: no test for term_dumpload() and term_dumpdiff()

Problem:    No test for term_dumpload() and term_dumpdiff().
Solution:   Add tests.

src/testdir/test_terminal.vim

@@ -968,3 +968,30 @@ func Test_terminal_open_autocmd()
   unlet s:called
   au! repro
 endfunction
+
+func Check_dump01(off)
+  call assert_equal('one two three four five', trim(getline(a:off + 1)))
+  call assert_equal('~           Select Word', trim(getline(a:off + 7)))
+  call assert_equal(':popup PopUp                                   :', trim(getline(a:off + 20)))
+endfunc
+
+" just testing basic functionality.
+func Test_terminal_dumpload()
+  call assert_equal(1, winnr('$'))
+  call term_dumpload('dumps/Test_popup_command_01.dump')
+  call assert_equal(2, winnr('$'))
+  call assert_equal(20, line('$'))
+  call Check_dump01(0)
+  quit
+endfunc
+
+func Test_terminal_dumpdiff()
+  call assert_equal(1, winnr('$'))
+  call term_dumpdiff('dumps/Test_popup_command_01.dump', 'dumps/Test_popup_command_02.dump')
+  call assert_equal(2, winnr('$'))
+  call assert_equal(62, line('$'))
+  call Check_dump01(0)
+  call Check_dump01(42)
+  call assert_equal('           bbbbbbbbbbbbbbbbbb ', getline(26)[0:29])
+  quit
+endfunc

src/version.c

@@ -766,6 +766,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1636,
 /**/
     1635,
 /**/