Add blank space when trimming the version

[marksabbath]

The verify-checksum command relies on the method find_var to get the WordPress version to check against. The version currently comes with an extra space which causes an additional character when performing the HTTP request to https://api.wordpress.org/core/checksums/1.0/.

Example HTTP request performed by verify-checksums:

https://api.wordpress.org/core/checksums/1.0/?version=%206.2.2

How it should look like:

https://api.wordpress.org/core/checksums/1.0/?version=6.2.2

Hope this saves some striping in the server.

[swissspidy]

Thanks!