fix: duplicate vesting and format (cosmos#9535)

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## Description

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are the most critical to review. -->

This pull request fixes the duplicate `vesting` command displayed with `--help` for the `tx` command. It also removes line breaks for consistent formatting across all commands and it fixes a minor typo.

## Manual Test

```
make build
```

```
./build/simd tx -h
```

```
./build/simd tx vesting -h
```

---

### 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...

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

### Reviewers Checklist

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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)

Author: ryanchristo

client/keys/root.go

@@ -44,7 +44,6 @@ The pass backend requires GnuPG: https://gnupg.org/
 		ImportKeyCommand(),
 		ListKeysCmd(),
 		ShowKeysCmd(),
-		flags.LineBreak,
 		DeleteKeyCommand(),
 		ParseKeyStringCommand(),
 		MigrateCommand(),

client/keys/root_test.go

@@ -11,5 +11,5 @@ func TestCommands(t *testing.T) {
 	assert.NotNil(t, rootCommands)
 
 	// Commands are registered
-	assert.Equal(t, 10, len(rootCommands.Commands()))
+	assert.Equal(t, 9, len(rootCommands.Commands()))
 }

server/util.go

@@ -264,10 +264,8 @@ func AddCommands(rootCmd *cobra.Command, defaultNodeHome string, appCreator type
 	rootCmd.AddCommand(
 		startCmd,
 		UnsafeResetAllCmd(),
-		flags.LineBreak,
 		tendermintCmd,
 		ExportCmd(appExport, defaultNodeHome),
-		flags.LineBreak,
 		version.NewVersionCommand(),
 	)
 }

simapp/simd/cmd/root.go

@@ -28,7 +28,6 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	authcmd "github.com/cosmos/cosmos-sdk/x/auth/client/cli"
 	"github.com/cosmos/cosmos-sdk/x/auth/types"
-	vestingcli "github.com/cosmos/cosmos-sdk/x/auth/vesting/client/cli"
 	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
 	"github.com/cosmos/cosmos-sdk/x/crisis"
 	genutilcli "github.com/cosmos/cosmos-sdk/x/genutil/client/cli"
@@ -151,12 +150,9 @@ func txCommand() *cobra.Command {
 		authcmd.GetMultiSignCommand(),
 		authcmd.GetMultiSignBatchCmd(),
 		authcmd.GetValidateSignaturesCommand(),
-		flags.LineBreak,
 		authcmd.GetBroadcastCommand(),
 		authcmd.GetEncodeCommand(),
 		authcmd.GetDecodeCommand(),
-		flags.LineBreak,
-		vestingcli.GetTxCmd(),
 	)
 
 	simapp.ModuleBasics.AddTxCommands(cmd)

x/auth/client/cli/decode.go

@@ -17,7 +17,7 @@ const flagHex = "hex"
 func GetDecodeCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "decode [amino-byte-string]",
-		Short: "Decode an binary encoded transaction string.",
+		Short: "Decode a binary encoded transaction string",
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) (err error) {
 			clientCtx := client.GetClientContextFromCmd(cmd)