Changed booleans to string comparison

alias

@@ -1,4 +1,4 @@
-if [ $BSD_MODE ]
+if [ $BSD_MODE = true ]
 then
   alias ls='ls -G'
   alias ll='ls -lGh'

zshrc

@@ -19,7 +19,7 @@ source $HOME/.zsh/exports
 source $HOME/.zsh/bindkeys
 source $HOME/.zsh/completion
 source $HOME/.zsh/setopt
-if [ $SYNTAX_HIGHLIGHT ]
+if [ $SYNTAX_HIGHLIGHT = true ]
 then
   source $HOME/.zsh/zsh-syntax-highlight/zsh-syntax-highlighting.zsh
 fi