[Bug] URL argument cannot be quoted with quotation marks

[TowardtheStars]

How to replicate

• Try to use image2map command with a valid URL
• Success
• Try to use image2map command with the same URL but qutoted with quotation marks
• Get hint from console: "That doesn't seem to be a valid image!"

Why it is a bug

Quotation marks are used to emphasize this is a string. Such usage is widely applied to most commands with arbitary strings in Minecraft, such as /tell, /scoreboard, etc. People may get confused if they cannot have quotation marks quoting URLs, such as the one in Issue #32