Rearrange suggest output and sys.exit

Closes #262 anc closes #263.

README.rst

@@ -57,14 +57,21 @@ For internal cross-references, locate ``objects.inv`` within ``build/html``::
 
     $ sphobjinv suggest doc/build/html/objects.inv as_rst -st 58
 
+    ------------------------------------------------
+
+    Cannot infer intersphinx_mapping from a local objects.inv.
+
+    ------------------------------------------------
+
     Project: sphobjinv
     Version: 2.3
 
     219 objects in inventory.
 
+    ------------------------------------------------
+
     11 results found at/above current threshold of 58.
 
-    Cannot infer intersphinx_mapping from a local objects.inv.
 
       Name                                                Score
     ---------------------------------------------------  -------
@@ -103,16 +110,22 @@ cross-reference the ``linspace`` function from numpy (see
     Attempting "https://numpy.org/doc/1.23/objects.inv" ...
       ... inventory found.
 
+    ------------------------------------------------
+
+    The intersphinx_mapping for this docset is LIKELY:
+
+      (https://numpy.org/doc/1.23/, None)
+
+    ------------------------------------------------
+
     Project: NumPy
     Version: 1.23
 
     8074 objects in inventory.
 
-    8 results found at/above current threshold of 75.
-
-    The intersphinx_mapping for this docset is LIKELY:
+    ------------------------------------------------
 
-      (https://numpy.org/doc/1.23/, None)
+    8 results found at/above current threshold of 75.
 
 
       Name                                                           Score

src/sphobjinv/cli/suggest.py

@@ -78,14 +78,21 @@ def do_suggest(inv, params):
         with_score=with_score,
     )
 
+    print_divider(params)
+    print_stderr_inferred_mapping(params)
+    print_divider(params)
+
     print_stderr(f"Project: {inv.project}", params)
     print_stderr(f"Version: {inv.version}\n", params)
 
     print_stderr(f"{inv.count} objects in inventory.\n", params)
+    print_divider(params)
 
     print_stderr_result_count(params, results)
 
-    print_stderr_inferred_mapping(params)
+    if not results:
+        print_stderr("\nExiting...\n", params)
+        sys.exit(0)
 
     # The query here for printing the full list only occurs in some
     # circumstances; see the function docstring.
@@ -94,6 +101,12 @@ def do_suggest(inv, params):
     print_results_table(with_index, with_score, results, params)
 
 
+def print_divider(params):
+    """Print a visual divider to break up sections of the CLI output."""
+    length = shutil.get_terminal_size().columns * 3 // 5
+    print_stderr("-" * length + "\n", params)
+
+
 def print_stderr_result_count(params, results):
     """Report the count of found objects from the suggest search."""
     if len(results) == 0:
@@ -104,7 +117,6 @@ def print_stderr_result_count(params, results):
             ),
             params,
         )
-        sys.exit(0)
     else:
         print_stderr(
             (