Jekyll assumes command options

[ashmaroli]

ref: Jekyll Issue/5345

• I believe this to be a bug, not a question about using Jekyll.
• I updated to the latest Jekyll

• I am on (or have tested on) _Windows_ 7

Steps to reproduce this error

Run any or all of the following:

• jekyll new TESTING 1 --blank
• jekyll new TESTING 2 --blan
• jekyll new TESTING 3 --bla
• jekyll new TESTING 4 --bl
• jekyll new TESTING 5 --b

The Output I Expected

Except for jekyll new TESTING 1 --blank
I expected every other command to throw a "command-option-unknown" error.
But.. nope. got none at all

Is this smartness by design?

/cc @jekyll/ecosystem