chore: change the inconsistent error message in DecCoin.ParseDecCoin …

…func (#9831)

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## Description

Closes: #9791 

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- [ ] 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
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types/dec_coin.go

@@ -628,7 +628,7 @@ func ParseDecCoin(coinStr string) (coin DecCoin, err error) {
 	}
 
 	if err := ValidateDenom(denomStr); err != nil {
-		return DecCoin{}, fmt.Errorf("invalid denom cannot contain upper case characters or spaces: %s", err)
+		return DecCoin{}, fmt.Errorf("invalid denom cannot contain spaces: %s", err)
 	}
 
 	return NewDecCoinFromDec(denomStr, amount), nil

types/dec_coin_test.go

@@ -671,7 +671,7 @@ func (s *decCoinTestSuite) TestDecCoins_IsAllPositive() {
 
 		{"One Coin - Zero value", sdk.DecCoins{sdk.DecCoin{testDenom1, sdk.NewDec(0)}}, false},
 
-		{"One Coin - Postive value", sdk.DecCoins{sdk.DecCoin{testDenom1, sdk.NewDec(5)}}, true},
+		{"One Coin - Positive value", sdk.DecCoins{sdk.DecCoin{testDenom1, sdk.NewDec(5)}}, true},
 
 		{"One Coin - Negative value", sdk.DecCoins{sdk.DecCoin{testDenom1, sdk.NewDec(-15)}}, false},
 
@@ -789,7 +789,7 @@ func (s *decCoinTestSuite) TestDecCoins_IsZero() {
 
 		{"One Coin - Zero value", sdk.DecCoins{sdk.DecCoin{testDenom1, sdk.NewDec(0)}}, true},
 
-		{"One Coin - Postive value", sdk.DecCoins{sdk.DecCoin{testDenom1, sdk.NewDec(5)}}, false},
+		{"One Coin - Positive value", sdk.DecCoins{sdk.DecCoin{testDenom1, sdk.NewDec(5)}}, false},
 
 		{"Multiple Coins - All zero value", sdk.DecCoins{
 			sdk.DecCoin{testDenom1, sdk.NewDec(0)},
@@ -1084,7 +1084,7 @@ func (s *decCoinTestSuite) TestDecCoin_Validate() {
 		input        sdk.DecCoin
 		expectedPass bool
 	}{
-		{"Uninitalized deccoin", empty, false},
+		{"Uninitialized deccoin", empty, false},
 
 		{"Invalid denom string", sdk.DecCoin{"(){9**&})", sdk.NewDec(33)}, false},
 
@@ -1121,11 +1121,9 @@ func (s *decCoinTestSuite) TestDecCoin_ParseDecCoin() {
 
 		{"Precision over limit", "9.11111111111111111111stake", empty, true},
 
-		// TODO - Clarify - According to error message for ValidateDenom call, supposed to
-		// throw error when upper case characters are used. Currently uppercase denoms are allowed.
-		{"Invalid denom", "9.3STAKE", sdk.DecCoin{"STAKE", sdk.NewDecWithPrec(93, 1)}, false},
+		{"Valid upper case denom", "9.3STAKE", sdk.DecCoin{"STAKE", sdk.NewDecWithPrec(93, 1)}, false},
 
-		{"Valid input - amount and denom seperated by space", "9.3 stake", sdk.DecCoin{"stake", sdk.NewDecWithPrec(93, 1)}, false},
+		{"Valid input - amount and denom separated by space", "9.3 stake", sdk.DecCoin{"stake", sdk.NewDecWithPrec(93, 1)}, false},
 
 		{"Valid input - amount and denom concatenated", "9.3stake", sdk.DecCoin{"stake", sdk.NewDecWithPrec(93, 1)}, false},
 	}