Make strings in the init_builtin_consts function const

[yuk1ty]

Make the following strings const:

• "name"
• "license"
• "credits"
• "copyright"
• "True"
• "False"
• "None"
• "NotImplemented"
• "Ellipsis"
• "_sitebuiltins._Printer"

266

I think opening pull requests per functions will work fine, so I'm going to make these fixes by the unit of functions 😃 If you have another preference, please let me know.

@mtshiba

[mtshiba]

Thanks!