Address upcoming string interpolation deprecation.
https://wiki.php.net/rfc/deprecate_dollar_brace_string_interpolation
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@@ -306,7 +306,7 @@ class DiskCache {
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if ($fake_extension)
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$fake_extension = ".$fake_extension";
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header("Content-Disposition: inline; filename=\"${filename}${fake_extension}\"");
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header("Content-Disposition: inline; filename=\"{$filename}{$fake_extension}\"");
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return $this->send_local_file($this->get_full_path($filename));
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}
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