Trim to remove space from the url minified if added in the footer

[jbma]

Originally reported by: Jean-Baptiste Marchand-Arvier (Bitbucket: jbma, GitHub: jbma)

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https://secure.helpscout.net/conversation/68262195/1751/

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• Bitbucket: https://bitbucket.org/wp-media/wp-rocket/issue/29

[jbma]

Original comment by Jonathan Buttigieg (Bitbucket: wp-media, GitHub: wp-media):

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fix bug #29 - Trim to remove space from the url minified if added in the footer