patch 8.0.1644: terminal API tests still fail

Problem:    Terminal API tests still fail.
Solution:   Explicitly set 'title' in the terminal job. (Ozaki Kiichi,
            closes #2750)

src/testdir/screendump.vim

@@ -24,7 +24,9 @@ source shared.vim
 " By default uses a size of 20 lines and 75 columns.
 " Returns the buffer number of the terminal.
 "
-" Options is a dictionary (not used yet).
+" Options is a dictionary, these items are recognized:
+" "rows" - height of the terminal window (max. 20)
+" "cols" - width of the terminal window (max. 78)
 func RunVimInTerminal(arguments, options)
   " If Vim doesn't exit a swap file remains, causing other tests to fail.
   " Remove it here.
@@ -47,17 +49,15 @@ func RunVimInTerminal(arguments, options)
   set t_Co=256 background=light
   hi Normal ctermfg=NONE ctermbg=NONE
 
-  " Make the window 20 lines high, unless told otherwise.
-  let rows = 20
-  if has_key(a:options, 'rows')
-    let rows = a:options['rows']
-  endif
+  " Make the window 20 lines high and 75 columns, unless told otherwise.
+  let rows = get(a:options, 'rows', 20)
+  let cols = get(a:options, 'cols', 75)
 
   let cmd = GetVimCommandClean()
   " Add -v to have gvim run in the terminal (if possible)
   let cmd .= ' -v ' . a:arguments
-  let buf = term_start(cmd, {'curwin': 1, 'term_rows': rows, 'term_cols': 75})
-  call assert_equal([rows, 75], term_getsize(buf))
+  let buf = term_start(cmd, {'curwin': 1, 'term_rows': rows, 'term_cols': cols})
+  call assert_equal([rows, cols], term_getsize(buf))
 
   return buf
 endfunc

src/testdir/test_terminal.vim

@@ -1029,10 +1029,10 @@ func Test_terminal_api_drop_newwin()
     return
   endif
   call assert_equal(1, winnr('$'))
-  set title
 
   " Use the title termcap entries to output the escape sequence.
   call writefile([
+	\ 'set title',
 	\ 'exe "set t_ts=\<Esc>]51; t_fs=\x07"',
 	\ 'let &titlestring = ''["drop","Xtextfile"]''',
 	\ 'redraw',
@@ -1046,7 +1046,6 @@ func Test_terminal_api_drop_newwin()
   call StopVimInTerminal(buf)
   call delete('Xscript')
   bwipe Xtextfile
-  set title&
 endfunc
 
 func Test_terminal_api_drop_oldwin()
@@ -1058,10 +1057,10 @@ func Test_terminal_api_drop_oldwin()
   let textfile_winid = win_getid()
   call assert_equal(2, winnr('$'))
   call win_gotoid(firstwinid)
-  set title
 
   " Use the title termcap entries to output the escape sequence.
   call writefile([
+	\ 'set title',
 	\ 'exe "set t_ts=\<Esc>]51; t_fs=\x07"',
 	\ 'let &titlestring = ''["drop","Xtextfile"]''',
 	\ 'redraw',
@@ -1074,7 +1073,6 @@ func Test_terminal_api_drop_oldwin()
   call StopVimInTerminal(buf)
   call delete('Xscript')
   bwipe Xtextfile
-  set title&
 endfunc
 
 func TryThis(bufnum, arg)
@@ -1086,10 +1084,10 @@ func Test_terminal_api_call()
   if !CanRunVimInTerminal()
     return
   endif
-  set title
 
   " Use the title termcap entries to output the escape sequence.
   call writefile([
+	\ 'set title',
 	\ 'exe "set t_ts=\<Esc>]51; t_fs=\x07"',
 	\ 'let &titlestring = ''["call","TryThis",["hello",123]]''',
 	\ 'redraw',
@@ -1104,5 +1102,4 @@ func Test_terminal_api_call()
   call delete('Xscript')
   unlet g:called_bufnum
   unlet g:called_arg
-  set title&
 endfunc

src/version.c

@@ -766,6 +766,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1644,
 /**/
     1643,
 /**/