chore: fix some comments (cosmos#21238)

Signed-off-by: luozexuan <[email protected]>

UPGRADING.md

@@ -728,7 +728,7 @@ And in the application client (usually `root.go`):
 	}
 ```
 
-When using `depinject` / `app v2`, the a tx config should be recreated from the `txConfigOpts` to use `NewGRPCCoinMetadataQueryFn` instead of depending on the bank keeper (that is used in the server).
+When using `depinject` / `app v2`, the tx config should be recreated from the `txConfigOpts` to use `NewGRPCCoinMetadataQueryFn` instead of depending on the bank keeper (that is used in the server).
 
 To learn more see the [docs](https://docs.cosmos.network/main/learn/advanced/transactions#sign_mode_textual) and the [ADR-050](https://docs.cosmos.network/main/build/architecture/adr-050-sign-mode-textual).
 

crypto/keys/secp256k1/internal/secp256k1/libsecp256k1/sage/group_prover.sage

@@ -3,7 +3,7 @@
 # to independently set assumptions on input or intermediary variables.
 #
 # The general approach is:
-# * A constraint is a tuple of two sets of of symbolic expressions:
+# * A constraint is a tuple of two sets of symbolic expressions:
 #   the first of which are required to evaluate to zero, the second of which
 #   are required to evaluate to nonzero.
 #   - A constraint is said to be conflicting if any of its nonzero expressions

x/auth/types/credentials.go

@@ -10,7 +10,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/types/address"
 )
 
-// NewBaseAccountWithPubKey creates an account with an a pubkey.
+// NewBaseAccountWithPubKey creates an account with a pubkey.
 func NewBaseAccountWithPubKey(pubkey cryptotypes.PubKey) (*BaseAccount, error) {
 	if pubkey == nil {
 		return nil, errors.New("pubkey cannot be nil")