constants vs nonconstant

[rubienr]

i am not experienced at all with rb but in [1] variables are uppercase whereas in [2] not. i had to go for uppercase (constants) int [2], to get the script running in interactive mode, else it would not wait for input and terminate immediately:

$./csv_issues_to_github.rb
Username:
Password:
Path for the CSV file you want to use?
You need to supply a CSV file. Thank you, come again.
$

[1] https://github.com/controlgroup/CSV-GitHub-import-export/blob/master/github_issues_to_csv.rb
[2] https://github.com/controlgroup/CSV-GitHub-import-export/blob/master/csv_issues_to_github.rb
[3] rb --version: rb (GNU lrzsz) 0.12.21rc