patch 8.0.1651: cannot filter :ls output for terminal buffers

Problem:    Cannot filter :ls output for terminal buffers.
Solution:   Add flags for terminal buffers. (Marcin Szamotulski, closes #2751)
diff --git a/runtime/doc/windows.txt b/runtime/doc/windows.txt
index 1c25392..c5021cd 100644
--- a/runtime/doc/windows.txt
+++ b/runtime/doc/windows.txt
@@ -1,4 +1,4 @@
-*windows.txt*   For Vim version 8.0.  Last change: 2017 Sep 25
+*windows.txt*   For Vim version 8.0.  Last change: 2018 Mar 29
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -731,8 +731,7 @@
 			the current window.
 			{cmd} can contain '|' to concatenate several commands.
 			{cmd} must not open or close windows or reorder them.
-			{not in Vi} {not available when compiled without the
-			|+listcmds| feature}
+			{not in Vi}
 			Also see |:tabdo|, |:argdo|, |:bufdo|, |:cdo|, |:ldo|,
 			|:cfdo| and |:lfdo|
 
@@ -760,8 +759,7 @@
 			autocommand event is disabled by adding it to
 			'eventignore'.  This considerably speeds up editing
 			each buffer.
-			{not in Vi} {not available when compiled without the
-			|+listcmds| feature}
+			{not in Vi}
 			Also see |:tabdo|, |:argdo|, |:windo|, |:cdo|, |:ldo|,
 			|:cfdo| and |:lfdo|
 
@@ -974,7 +972,6 @@
 A hidden buffer is not displayed in a window, but is still loaded into memory.
 This makes it possible to jump from file to file, without the need to read or
 write the file every time you get another buffer in a window.
-{not available when compiled without the |+listcmds| feature}
 
 							*:buffer-!*
 If the option 'hidden' ('hid') is set, abandoned buffers are kept for all
@@ -1049,6 +1046,9 @@
 		     x   buffers with a read error
 		     %   current buffer
 		     #   alternate buffer
+		     R	 terminal buffers with a running job
+		     F	 terminal buffers with a finished job
+		     ?   terminal buffers without a job: `:terminal NONE`
 		Combining flags means they are "and"ed together, e.g.:
 		     h+   hidden buffers which are modified
 		     a+   active buffers which are modified
diff --git a/src/buffer.c b/src/buffer.c
index 4b79840..0e13e1f 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2930,18 +2930,34 @@
     int		i;
     int		ro_char;
     int		changed_char;
+#ifdef FEAT_TERMINAL
+    int		job_running;
+    int		job_none_open;
+#endif
 
     for (buf = firstbuf; buf != NULL && !got_int; buf = buf->b_next)
     {
+#ifdef FEAT_TERMINAL
+	job_running = term_job_running(buf->b_term);
+	job_none_open = job_running && term_none_open(buf->b_term);
+#endif
 	/* skip unlisted buffers, unless ! was used */
 	if ((!buf->b_p_bl && !eap->forceit && !vim_strchr(eap->arg, 'u'))
 		|| (vim_strchr(eap->arg, 'u') && buf->b_p_bl)
 		|| (vim_strchr(eap->arg, '+')
 			&& ((buf->b_flags & BF_READERR) || !bufIsChanged(buf)))
 		|| (vim_strchr(eap->arg, 'a')
-			 && (buf->b_ml.ml_mfp == NULL || buf->b_nwindows == 0))
+			&& (buf->b_ml.ml_mfp == NULL || buf->b_nwindows == 0))
 		|| (vim_strchr(eap->arg, 'h')
-			 && (buf->b_ml.ml_mfp == NULL || buf->b_nwindows != 0))
+			&& (buf->b_ml.ml_mfp == NULL || buf->b_nwindows != 0))
+#ifdef FEAT_TERMINAL
+		|| (vim_strchr(eap->arg, 'R')
+			&& (!job_running || (job_running && job_none_open)))
+		|| (vim_strchr(eap->arg, '?')
+			&& (!job_running || (job_running && !job_none_open)))
+		|| (vim_strchr(eap->arg, 'F')
+			&& (job_running || buf->b_term == NULL))
+#endif
 		|| (vim_strchr(eap->arg, '-') && buf->b_p_ma)
 		|| (vim_strchr(eap->arg, '=') && !buf->b_p_ro)
 		|| (vim_strchr(eap->arg, 'x') && !(buf->b_flags & BF_READERR))
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 892da50..5e817de 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -45,11 +45,17 @@
   call assert_equal('t', mode())
   call assert_equal('yes', b:done)
   call assert_match('%aR[^\n]*running]', execute('ls'))
+  call assert_match('%aR[^\n]*running]', execute('ls R'))
+  call assert_notmatch('%[^\n]*running]', execute('ls F'))
+  call assert_notmatch('%[^\n]*running]', execute('ls ?'))
 
   call Stop_shell_in_terminal(buf)
   call term_wait(buf)
   call assert_equal('n', mode())
   call assert_match('%aF[^\n]*finished]', execute('ls'))
+  call assert_match('%aF[^\n]*finished]', execute('ls F'))
+  call assert_notmatch('%[^\n]*finished]', execute('ls R'))
+  call assert_notmatch('%[^\n]*finished]', execute('ls ?'))
 
   " closing window wipes out the terminal buffer a with finished job
   close
diff --git a/src/version.c b/src/version.c
index ae154b4..40746fe 100644
--- a/src/version.c
+++ b/src/version.c
@@ -763,6 +763,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1651,
+/**/
     1650,
 /**/
     1649,