Add test_apropos_should_also_search_settings_description() to make sure that:

    apropos 'environment variable'

searches all settings description and returns a topic related to:

    target.process.env-vars

llvm-svn: 124841
diff --git a/lldb/test/settings/TestSettings.py b/lldb/test/settings/TestSettings.py
index 68d2158..bf1e096 100644
--- a/lldb/test/settings/TestSettings.py
+++ b/lldb/test/settings/TestSettings.py
@@ -19,6 +19,14 @@
         system(["/bin/sh", "-c", "rm -f stderr.txt"])
         system(["/bin/sh", "-c", "rm -f stdout.txt"])
 
+    def test_apropos_should_also_search_settings_description(self):
+        """Test that 'apropos' command should also search descriptions for the settings variables."""
+
+        self.expect("apropos 'environment variable'",
+            substrs = ["target.process.env-vars",
+                       "environment variables",
+                       "executable's environment"])
+
     def test_set_prompt(self):
         """Test that 'set prompt' actually changes the prompt."""