Add alias for rlwrap

shrc

@@ -309,6 +309,7 @@ __safe_alias ipy=ipython
 __safe_alias ipy3=ipython3
 __safe_alias ipy2=ipython2
 __safe_alias javac="javac -J-Duser.language=en"
+__safe_alias rl=rlwrap
 # Sometimes SHELL cannot be used. For example, when running bash inside zsh
 # SHELL is set to be /bin/zsh
 if $inbash