fix modulus formatting

Author: jkataja

src/core/operations/ParseCSR.mjs

@@ -71,7 +71,7 @@ ${formatAttributes(csr)}
 Public Key:
   Key Size:                 ${csr.publicKey.n.bitLength()} bits
   Modulus:
-${formatMultiLine(chop(csr.publicKey.n.toString(16).replace(/(..)$!/g, "$&:")))}
+${formatMultiLine(chop(csr.publicKey.n.toString(16).replace(/(..)/g, "$&:")))}
   Exponent:                 ${csr.publicKey.e} (0x${Utils.hex(csr.publicKey.e)})
 
 Signature: