Apply suggestions from code review

Co-Authored-By: Jack Zampolin <jack.zampolin@gmail.com>

types/decimal.go

@@ -560,7 +560,6 @@ func ValidSortableDec(dec Dec) bool {
 
 // FormattingStringSortableBytes is the string used in Sprintf to left and right pad the sdk.Dec
 // It adjusts based on the Precision constant
-var FormattingStringSortableBytes = fmt.Sprintf("%%0%ds", Precision*2+1)
 
 // Returns a byte slice representation of an sdk.Dec that can be sorted.
 // Left and right pads with 0s so there are 18 digits to left and right of decimal point
@@ -569,7 +568,7 @@ func SortableDecBytes(dec Dec) []byte {
 	if !ValidSortableDec(dec) {
 		panic("dec must be within bounds")
 	}
-	return []byte(fmt.Sprintf(FormattingStringSortableBytes, dec.String()))
+	return []byte(fmt.Sprintf(fmt.Sprintf("%%0%ds", Precision*2+1), dec.String()))
 }
 
 //___________________________________________________________________________________