Un-encode characters in xref links (System.P/System.S/System.T)

[gewarren]

• Replace %60 with `
• Replace %40 with @
• Replace %2A with *
• Replace %2C with ,
• Replace %28 with (
• Replace %29 with )
• Replace %5B with [
• Replace %5D with [
• Replace %7B with {
• Replace %7D with }

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