Change --nth option for CTRL-R key binding (#90)

Remove `1` from --nth option. With the change you can no more use `$`
anchor to match the tail of a command index. But it makes search
around 15% faster.

    jg@jg:~> time cat history | fzf +s -n..,1,2.. -f fzf > /dev/nul
    real    0m2.929s
    user    0m2.766s
    sys     0m0.154s

    jg@jg:~> time cat history | fzf +s -n2..,.. -f fzf > /dev/null
    real    0m2.535s
    user    0m2.422s
    sys     0m0.112s

install

@@ -144,7 +144,7 @@ if [ -z "$(set -o | grep '^vi.*on')" ]; then
   fi
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind '"\C-r": " \C-e\C-u$(HISTTIMEFORMAT= history | fzf +s +m -n..,1,2.. | sed \"s/ *[0-9]* *//\")\e\C-e\er"'
+  bind '"\C-r": " \C-e\C-u$(HISTTIMEFORMAT= history | fzf +s +m -n2..,.. | sed \"s/ *[0-9]* *//\")\e\C-e\er"'
 
   # ALT-C - cd into the selected directory
   bind '"\ec": " \C-e\C-u$(__fcd)\e\C-e\er\C-m"'
@@ -162,7 +162,7 @@ else
   bind -m vi-command '"\C-t": "i\C-t"'
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind '"\C-r": "\eddi$(HISTTIMEFORMAT= history | fzf +s +m -n..,1,2.. | sed \"s/ *[0-9]* *//\")\C-x\C-e\e$a\C-x\C-r"'
+  bind '"\C-r": "\eddi$(HISTTIMEFORMAT= history | fzf +s +m -n2..,.. | sed \"s/ *[0-9]* *//\")\C-x\C-e\e$a\C-x\C-r"'
   bind -m vi-command '"\C-r": "i\C-r"'
 
   # ALT-C - cd into the selected directory
@@ -223,7 +223,7 @@ bindkey '\ec' fzf-cd-widget
 
 # CTRL-R - Paste the selected command from history into the command line
 fzf-history-widget() {
-  LBUFFER=$(fc -l 1 | fzf +s +m -n..,1,2.. | sed "s/ *[0-9*]* *//")
+  LBUFFER=$(fc -l 1 | fzf +s +m -n2..,.. | sed "s/ *[0-9*]* *//")
   zle redisplay
 }
 zle     -N   fzf-history-widget