diff --git a/knack/help.py b/knack/help.py
index 78570f7..80ccd72 100644
--- a/knack/help.py
+++ b/knack/help.py
@@ -385,7 +385,7 @@ def _build_long_summary(item):
                 lines.append(str(item.deprecate_info.message))
             if item.preview_info:
                 lines.append(str(item.preview_info.message))
-            return ' '.join(lines)
+            return '\n'.join(lines)
 
         indent += 1
         long_sum = _build_long_summary(help_file)
diff --git a/tests/test_deprecation.py b/tests/test_deprecation.py
index fc2165b..323f956 100644
--- a/tests/test_deprecation.py
+++ b/tests/test_deprecation.py
@@ -93,8 +93,9 @@ def test_deprecate_command_help_hidden(self):
         expected = """
 Command
     {} cmd3 : Short summary here.
-        Long summary here. Still long summary. This command has been deprecated and will be
-        removed in a future release. Use 'alt-cmd3' instead.
+        Long summary here. Still long summary.
+        This command has been deprecated and will be removed in a future release. Use 'alt-
+        cmd3' instead.
 
 Arguments
     -b [Required] : Allowed values: a, b, c.
@@ -245,9 +246,9 @@ def test_deprecate_command_implicitly(self):
         expected = """
 Command
     {} group1 cmd1 : Short summary here.
-        Long summary here. Still long summary. This command is implicitly deprecated because
-        command group 'group1' is deprecated and will be removed in a future release. Use 'alt-
-        group1' instead.
+        Long summary here. Still long summary.
+        This command is implicitly deprecated because command group 'group1' is deprecated and
+        will be removed in a future release. Use 'alt-group1' instead.
 """.format(self.cli_ctx.name)
         self.assertIn(expected, actual)
 
diff --git a/tests/test_preview.py b/tests/test_preview.py
index e70216b..f6e7084 100644
--- a/tests/test_preview.py
+++ b/tests/test_preview.py
@@ -141,8 +141,9 @@ def test_preview_command_implicitly(self):
         expected = """
 Command
     {} group1 cmd1 : Short summary here.
-        Long summary here. Still long summary. Command group 'group1' is in preview. It may be
-        changed/removed in a future release.
+        Long summary here. Still long summary.
+        Command group 'group1' is in preview. It may be changed/removed in a future
+        release.
 """.format(self.cli_ctx.name)
         self.assertIn(expected, actual)