Modify CTRL-R behavior to execute on Enter

If you want to edit the command before execution, press Ctrl-E instead
of Enter when selecting the entry.

Taken from: junegunn#477

shell/key-bindings.zsh

@@ -101,12 +101,18 @@ fzf-history-widget() {
   local selected num
   setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases 2> /dev/null
   selected=( $(fc -rl 1 | perl -ne 'print if !$seen{(/^\s*[0-9]+\s+(.*)/, $1)}++' |
-    FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} $FZF_DEFAULT_OPTS -n2..,.. --tiebreak=index --bind=ctrl-r:toggle-sort $FZF_CTRL_R_OPTS --query=${(qqq)LBUFFER} +m" $(__fzfcmd)) )
+    FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} $FZF_DEFAULT_OPTS -n2..,.. --tiebreak=index --bind=ctrl-r:toggle-sort --expect=ctrl-e $FZF_CTRL_R_OPTS --query=${(qqq)LBUFFER} +m" $(__fzfcmd)) )
   local ret=$?
   if [ -n "$selected" ]; then
+    local accept=0
+    if [[ $selected[1] = ctrl-e ]]; then
+        accept=1
+        shift selected
+    fi
     num=$selected[1]
     if [ -n "$num" ]; then
       zle vi-fetch-history -n $num
+      [[ $accept = 0 ]] && zle accept-line
     fi
   fi
   zle reset-prompt