Don't escape_default all non-ascii text #215
Merged
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Using escape_debug instead of escape_default matches the behavior of libproc_macro for:
Before:
"\u{3053}\u{3093}\u{306b}\u{3061}\u{306f}\u{4e16}\u{754c}"After:
"こんにちは世界"Fixes dtolnay/syn#772.