patch 8.2.0314: short name not set for terminal buffer

Problem:    Short name not set for terminal buffer.
Solution:   Set the short name. (closes #5687)

src/terminal.c

@@ -566,6 +566,8 @@ term_start(
 	    }
 	}
     }
+    vim_free(curbuf->b_sfname);
+    curbuf->b_sfname = vim_strsave(curbuf->b_ffname);
     curbuf->b_fname = curbuf->b_ffname;
 
     if (opt->jo_term_opencmd != NULL)

src/testdir/test_terminal.vim

@@ -2405,3 +2405,9 @@ func Test_issue_5607()
     bw!
   endtry
 endfunc
+
+func Test_hidden_terminal()
+  let buf = term_start(&shell, #{hidden: 1})
+  call assert_equal('', bufname('^$'))
+  call StopShellInTerminal(buf)
+endfunc

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    314,
 /**/
     313,
 /**/