A previous commit to fix json formatting for null results
(0b1ddc5f6652bde99d63d9d553777b3d926694cf) accidentally introduced a
regression that removed trailing newlines for non-json output.  (There
wasn't a good test for this previously, but there is now).  The
problem is due to the fundamental differences in formatting between
the json and non-json outputs.  The only way to fix this was to add a
new formatting field that represents the string to output at the end
of a null result.

All output formatting tests should pass now.
---
 notmuch-search.c |   18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/notmuch-search.c b/notmuch-search.c
index 8b90121..69af617 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -48,6 +48,7 @@ typedef struct search_format {
     const char *item_sep;
     const char *item_end;
     const char *results_end;
+    const char *results_null;
 } search_format_t;
 
 static void
@@ -72,6 +73,7 @@ static const search_format_t format_text = {
 		"%s", " ",
 	    ")", "\n",
 	"",
+    "\n",
     "",
 };
 
@@ -98,6 +100,7 @@ static const search_format_t format_json = {
 	    "]", ",\n",
 	"}",
     "]\n",
+    "]\n",
 };
 
 static void
@@ -236,7 +239,10 @@ do_search_threads (const search_format_t *format,
 	notmuch_thread_destroy (thread);
     }
 
-    fputs (format->results_end, stdout);
+    if (first_thread)
+	fputs (format->results_null, stdout);
+    else
+	fputs (format->results_end, stdout);
 
     return 0;
 }
@@ -280,7 +286,10 @@ do_search_messages (const search_format_t *format,
 
     notmuch_messages_destroy (messages);
 
-    fputs (format->results_end, stdout);
+    if (first_message)
+	fputs (format->results_null, stdout);
+    else
+	fputs (format->results_end, stdout);
 
     return 0;
 }
@@ -329,7 +338,10 @@ do_search_tags (notmuch_database_t *notmuch,
     if (messages)
 	notmuch_messages_destroy (messages);
 
-    fputs (format->results_end, stdout);
+    if (first_tag)
+	fputs (format->results_null, stdout);
+    else
+	fputs (format->results_end, stdout);
 
     return 0;
 }
-- 
1.7.4.4