Fix $replace parameter handling in get_config()
Code was reached only on first function call, then short-circuited because of the reference cache.
diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
index a026920..c962fda 100644
--- a/system/core/CodeIgniter.php
+++ b/system/core/CodeIgniter.php
@@ -88,7 +88,7 @@
* The subclass prefix allows CI to know if a core class is
* being extended via a library in the local application
* "libraries" folder. Since CI allows config items to be
- * overriden via data set in the main index. php file,
+ * overriden via data set in the main index.php file,
* before proceeding we need to know if a subclass_prefix
* override exists. If so, we will set this value now,
* before any classes are loaded