Add a period.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@149305 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/dotest.py b/test/dotest.py
index bdb5168..0e2b109 100755
--- a/test/dotest.py
+++ b/test/dotest.py
@@ -1027,7 +1027,7 @@
 for env_var in unsets :
     if env_var in os.environ:
         # From Python Doc: When unsetenv() is supported, deletion of items in os.environ
-        # is automatically translated into a corresponding call to unsetenv()
+        # is automatically translated into a corresponding call to unsetenv().
         del os.environ[env_var]
         #os.unsetenv(env_var)