Add late escaping to CMB2_Display_File #1262
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Description
Picking off some escaping/sanitizing from #1260. This PR late-escapes output from the
file_outputmethod of theCMB2_Display_Fileclass. I realize that we're already escaping the URL in https://github.com/CMB2/CMB2/blob/develop/includes/CMB2_Field_Display.php#L397, but late-escaping is preferred and we could possibly get rid of the early-escaping from the link above.Motivation and Context
Hardening escaping and sanitizing throughout the plugin.
Risk Level
Minimal risk
Testing procedure
Types of changes
Checklist: