utility: fix safe-ops commands

Fixes #1699

modules/utility/init.zsh

@@ -66,10 +66,10 @@ alias mvi="${aliases[mv]:-mv} -i"
 alias cpi="${aliases[cp]:-cp} -i"
 alias lni="${aliases[ln]:-ln} -i"
 if zstyle -T ':prezto:module:utility' safe-ops; then
-  alias rm='rmi'
+  alias rm="${aliases[rm]:-rm} -i"
-  alias mv='mvi'
+  alias mv="${aliases[mv]:-mv} -i"
-  alias cp='cpi'
+  alias cp="${aliases[cp]:-cp} -i"
-  alias ln='lni'
+  alias ln="${aliases[ln]:-ln} -i"
 fi
 
 # ls