duplicate parameter name

[kwiatkk1]

Hi,

I've noticed that serialization of a large number of variables can lead to unexpected problems because getName function can produce duplicates:

• getName(230) =>do_; (reserved word do + _ suffix)
• getName(12526) => do_; (created "regularly")

Using any number as a suffix to alter reserved word is safe:

• number won't be at the beginning of an identifier
• numbers are not included in chars that are used to generate names, so no risk of duplicates

[Rich-Harris]

thank you — closing in favour of #33