Parsing error of Execution Time and JIT time because of double quptes

[Krysztophe]

pev2 correctly formats plans with leading and trailing double quotes,
but there is a problem in some cases, where the Execution time and the JIT time are not computed.

Example: https://explain.dalibo.com/plan/2e9h69cgh629f36e

This works when removing all " : https://explain.dalibo.com/plan/b9b6eg9f61e9eh4f

(The plan was massively edited for confidentiality but that does not change the problem; real plans in private if needed).