repl: don't auto-complete array indices

[bnoordhuis]

$ node
> process.versions.node
'0.11.3-pre'
> var a = [1,2,3]
> a.<TAB>
a.__defineGetter__      a.__defineSetter__      a.__lookupGetter__      a.__lookupSetter__      a.__proto__
a.constructor           a.hasOwnProperty        a.isPrototypeOf         a.propertyIsEnumerable  a.toLocaleString
a.toString              a.valueOf               

a.concat                a.constructor           a.every                 a.filter                a.forEach
a.indexOf               a.join                  a.lastIndexOf           a.length                a.map
a.pop                   a.push                  a.reduce                a.reduceRight           a.reverse
a.shift                 a.slice                 a.some                  a.sort                  a.splice
a.toLocaleString        a.toString              a.unshift               

a.0                     a.1                     a.2                     a.length
> a.0
...

The current auto-completion is:

• not very useful because a.0 is not a valid syntactic construct, and
• annoying when the array is large - the REPL lists all indices and you can't interrupt it

[brendanashworth]

See: nodejs/node#2409 which landed as nodejs/node@ce145bf. It is currently marked for a 0.10 and 0.12 backport, so I don't know if this issue is still relevant.