patch 9.0.1855: mode() doesn't indicate command line for terminal

Problem:  mode() doesn't indicate command line for terminal
Solution: make it return 'ct' for command-line from Terminal mode

closes: #6265
closes: #13017
closes: #13018

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: h-east <h.east.727@gmail.com>
diff --git a/src/misc1.c b/src/misc1.c
index 7208350..5b008c6 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -664,7 +664,11 @@
     }
 #ifdef FEAT_TERMINAL
     else if (term_use_loop())
+    {
+	if (State & MODE_CMDLINE)
+	    buf[i++] = 'c';
 	buf[i++] = 't';
+    }
 #endif
     else if (VIsual_active)
     {
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index ab1dbf3..654d912 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -935,9 +935,19 @@
 
   if has('terminal')
     term
+    " Terminal-Job mode
+    call assert_equal('t', mode())
+    call assert_equal('t', mode(1))
+    call feedkeys("\<C-W>:echo \<C-R>=Save_mode()\<C-U>\<CR>", 'xt')
+    call assert_equal("c-ct", g:current_modes)
+    call feedkeys("\<Esc>", 'xt')
+
+    " Terminal-Normal mode
     call feedkeys("\<C-W>N", 'xt')
     call assert_equal('n', mode())
     call assert_equal('nt', mode(1))
+    call feedkeys(":echo \<C-R>=Save_mode()\<C-U>\<CR>", 'xt')
+    call assert_equal("c-c", g:current_modes)
     call feedkeys("aexit\<CR>", 'xt')
   endif
 
diff --git a/src/version.c b/src/version.c
index c1f72ff..a07a2bf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1855,
+/**/
     1854,
 /**/
     1853,