docs: x/gov state machine inline comments changes (#11498)

## Description

ref: #11086 

---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

x/gov/keeper/deposit.go

@@ -109,8 +109,8 @@ func (keeper Keeper) IterateDeposits(ctx sdk.Context, proposalID uint64, cb func
 	}
 }
 
-// AddDeposit adds or updates a deposit of a specific depositor on a specific proposal
-// Activates voting period when appropriate
+// AddDeposit adds or updates a deposit of a specific depositor on a specific proposal.
+// Activates voting period when appropriate and returns true in that case, else returns false.
 func (keeper Keeper) AddDeposit(ctx sdk.Context, proposalID uint64, depositorAddr sdk.AccAddress, depositAmount sdk.Coins) (bool, error) {
 	// Checks to see if proposal exists
 	proposal, ok := keeper.GetProposal(ctx, proposalID)

x/gov/keeper/grpc_query.go

@@ -184,7 +184,7 @@ func (q Keeper) Params(c context.Context, req *v1.QueryParamsRequest) (*v1.Query
 	}
 }
 
-// Deposit queries single deposit information based proposalID, depositAddr
+// Deposit queries single deposit information based on proposalID, depositAddr.
 func (q Keeper) Deposit(c context.Context, req *v1.QueryDepositRequest) (*v1.QueryDepositResponse, error) {
 	if req == nil {
 		return nil, status.Error(codes.InvalidArgument, "invalid request")

x/gov/keeper/keeper.go

@@ -33,7 +33,7 @@ type Keeper struct {
 	// The (unexposed) keys used to access the stores from the Context.
 	storeKey storetypes.StoreKey
 
-	// The codec codec for binary encoding/decoding.
+	// The codec for binary encoding/decoding.
 	cdc codec.BinaryCodec
 
 	// Legacy Proposal router