sig.verify(sigValueHex) returns true if sigValueHex contains extra non-hex chars

[undavide]

Hello,
following the Signature tutorial I've found that the roundtrip check works as expected.
Yet, if I log the var sigValueHex = sig.sign(); before passing it on to the verification and add an extra char, say a z to it, the following sig.verify(sigValueHex) returns true anyway - which IMHO should not.
Thank you