Merge PR 1354: CLI: Show fractional in human-readable format

Fix #1353

before:
```
Shares: Status Bonded,  Amount: -6508168128760126341/-3308135364330552608
Delegator Shares: -6508168128760126341/-3308135364330552608
```
after:
```
Shares: Status Bonded,  Amount: 2.0000000000
Delegator Shares: 2.0000000000
```

CHANGELOG.md

@@ -34,6 +34,7 @@ FIXES
 * Fixed bug where chain ID wasn't passed properly in x/bank REST handler
 * Fixed bug where `democli account` didn't decode the account data correctly
 * \#1343 - fixed unnecessary parallelism in CI
+* \#1353 - CLI: Show pool shares fractions in human-readable format
 * \#1258 - printing big.rat's can no longer overflow int64
 
 ## 0.19.0

types/rational.go

@@ -116,6 +116,7 @@ func (r Rat) Quo(r2 Rat) Rat    { return Rat{*new(big.Rat).Quo(&(r.Rat), &(r2.Ra
 func (r Rat) Add(r2 Rat) Rat    { return Rat{*new(big.Rat).Add(&(r.Rat), &(r2.Rat))} } // Add - addition
 func (r Rat) Sub(r2 Rat) Rat    { return Rat{*new(big.Rat).Sub(&(r.Rat), &(r2.Rat))} } // Sub - subtraction
 func (r Rat) String() string    { return r.Rat.String() }
+func (r Rat) FloatString() string { return r.Rat.FloatString(10) } // a human-friendly string format. The last digit is rounded to nearest, with halves rounded away from zero.
 
 var (
 	zero  = big.NewInt(0)

x/stake/validator.go

@@ -272,8 +272,8 @@ func (v Validator) HumanReadableString() (string, error) {
 	resp := "Validator \n"
 	resp += fmt.Sprintf("Owner: %s\n", bechOwner)
 	resp += fmt.Sprintf("Validator: %s\n", bechVal)
-	resp += fmt.Sprintf("Shares: Status %s,  Amount: %s\n", sdk.BondStatusToString(v.PoolShares.Status), v.PoolShares.Amount.String())
-	resp += fmt.Sprintf("Delegator Shares: %s\n", v.DelegatorShares.String())
+	resp += fmt.Sprintf("Shares: Status %s,  Amount: %s\n", sdk.BondStatusToString(v.PoolShares.Status), v.PoolShares.Amount.FloatString())
+	resp += fmt.Sprintf("Delegator Shares: %s\n", v.DelegatorShares.FloatString())
 	resp += fmt.Sprintf("Description: %s\n", v.Description)
 	resp += fmt.Sprintf("Bond Height: %d\n", v.BondHeight)
 	resp += fmt.Sprintf("Proposer Reward Pool: %s\n", v.ProposerRewardPool.String())