[p2] Incorrect accuracy display in the return of "gov query-params"

[shilei-wang]

In non-json mode， output (slashing/min_signed_per_window) accuracy is incorrect

---

To Reproduce

json mode (correct):
iriscli gov query-params --trust-node --module=slashing -o=json --indent
{
"type": "irishub/slashing/Params",
"value": {
"max_evidence_age": "51840",
"signed_blocks_window": "10",
min_signed_per_window: 0.5000000000,
"double_sign_jail_duration": "172800000000000",
"downtime_jail_duration": "86400000000000",
"censorship_jail_duration": "172800000000000",
"slash_fraction_double_sign": "0.0100000000",
"slash_fraction_downtime": "0.0000000000",
"slash_fraction_censorship": "0.0000000000"
}
}

non-json mode (incorrect):
iriscli gov query-params --trust-node --module=slashing
Slashing Params:
Max Evidence Age: 51840
Signed Blocks Window: 10
Min Signed Per Window: 5000000000
DoubleSign Jail Duration: 48h0m0s
Downtime Jail Duration: 24h0m0s
Censorship Jail Duration: 48h0m0s
Slash Fraction DoubleSign: 0.0100000000
Slash Fraction Downtime: 0.0000000000
Slash Fraction Censorship: 0.0000000000

[shilei-wang]

confirmed