diff --git a/lib/history.bash b/lib/history.bash
old mode 100644
new mode 100755
index 92db21f9..d582192b
--- a/lib/history.bash
+++ b/lib/history.bash
@@ -1,18 +1,10 @@
 #!/usr/bin/env bash
 
-# append to bash_history if Terminal.app quits
-shopt -s histappend
-
-# history handling
-#
-# Erase duplicates
-# Bash History
-export HISTCONTROL="ignoredups"
-export HISTCONTROL=erasedups
-
-# resize history size
-export HISTSIZE=5000
+# Bash History Handling
 
+shopt -s histappend              # append to bash_history if Terminal.app quits
+export HISTCONTROL=erasedups     # erase duplicates; alternative option: export HISTCONTROL=ignoredups
+export HISTSIZE=5000             # resize history size
 export AUTOFEATURE=true autotest
 
 function rh {