ruby - json files saved with trailing "?" -


i'm saving bunch of data hash , saving json file. code saving:

    def write_to_file(id, data)        dir.chdir(file.dirname(__file__)+"/specs")        filename = "./"+id+".json"        file.open("#{filename}", 'w') |f2|             f2.write(data.to_json)        end      end

i want save id.json, file getting saved "?" @ end. example, 199015806906670?.json original value of "id" 199015806806670.
if search 19901580606670 unable use tab autocomplete. know why happening?

edit: sample file containing ids:

104184946332304
131321736945390
693134284084652
146974018804301
288608807960773

code these: 

    url = file.open("newapps/curlist.txt","r")     url.each_line |line|       func1(line) #func1 calls write_to_file, no changes line in func1     end

as has been mentioned in comments have newline last character of id field. character (being invalid) being replaced question mark.

use remove newline...

filename = "./"+id.chomp+".json"

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