Address @fedekunze PR comments

PENDING.md

@@ -18,7 +18,8 @@ BREAKING CHANGES
   * [\#3069](https://github.com/cosmos/cosmos-sdk/pull/3069) `--fee` flag renamed to `--fees` to support multiple coins
   * [\#3156](https://github.com/cosmos/cosmos-sdk/pull/3156) Remove unimplemented `gaiacli init` command
   * [\#2222] `gaiacli tx stake` -> `gaiacli tx staking`, `gaiacli query stake` -> `gaiacli query staking`
-  * [\#3320](https://github.com/cosmos/cosmos-sdk/pull/3320) Ensure all `gaiacli query` commands respect the `--output` and `--indent` flags 
+  * [\#3320](https://github.com/cosmos/cosmos-sdk/pull/3320) Ensure all `gaiacli query` commands respect the `--output` and `--indent` flags
+  * [\#3268](https://github.com/cosmos/cosmos-sdk/issues/3268) Unify `params` queries call
 
 * Gaia
   * https://github.com/cosmos/cosmos-sdk/issues/2838 - Move store keys to constants

docs/gaia/gaiacli.md

@@ -624,6 +624,11 @@ To check the current governance parameters run:
 
 ```bash
 gaiacli query gov params
+```
+
+To query subsets of the governance parameters run:
+
+```bash
 gaiacli query gov param voting
 gaiacli query gov param tallying
 gaiacli query gov param deposit

x/gov/client/utils/query.go

@@ -22,6 +22,10 @@ type Proposer struct {
 	Proposer   string `json:"proposer"`
 }
 
+func NewProposer(proposalID uint64, proposer string) Proposer {
+	return Proposer{proposalID, proposer}
+}
+
 func (p Proposer) String() string {
 	return fmt.Sprintf(`ProposalID: %d
 Proposer:   %s`, p.ProposalID, p.Proposer)
@@ -225,10 +229,7 @@ func QueryProposerByTxQuery(
 			// there should only be a single proposal under the given conditions
 			if msg.Type() == gov.TypeMsgSubmitProposal {
 				subMsg := msg.(gov.MsgSubmitProposal)
-				return Proposer{
-					ProposalID: proposalID,
-					Proposer:   subMsg.Proposer.String(),
-				}, nil
+				return NewProposer(proposalID, subMsg.Proposer.String()), nil
 			}
 		}
 	}