[ci skip] Merge pull request #4986 from ka7/feature/spelling

Spelling fixes in comment blocks and docs
diff --git a/system/libraries/Typography.php b/system/libraries/Typography.php
index ce31ba3..b25d8fd 100644
--- a/system/libraries/Typography.php
+++ b/system/libraries/Typography.php
@@ -241,7 +241,7 @@
 						// Clean up stray paragraph tags that appear before block level elements
 						'#<p></p><('.$this->block_elements.')#'	=> '<$1',
 
-						// Clean up stray non-breaking spaces preceeding block elements
+						// Clean up stray non-breaking spaces preceding block elements
 						'#(&nbsp;\s*)+<('.$this->block_elements.')#'	=> '  <$2',
 
 						// Replace the temporary markers we added earlier