Fix typos (OpenZeppelin#2343)

DOCUMENTATION.md

@@ -10,7 +10,7 @@ program that extracts the API Reference from source code.
 
 The [`docs.openzeppelin.com`](https://github.com/OpenZeppelin/docs.openzeppelin.com)
 repository hosts the configuration for the entire site, which includes
-documetation for all of the OpenZeppelin projects.
+documentation for all of the OpenZeppelin projects.
 
 To run the docs locally you should run `npm run docs:watch` on this
 repository.

contracts/GSN/GSNRecipient.sol

@@ -115,7 +115,7 @@ abstract contract GSNRecipient is IRelayRecipient, Context {
     /**
      * @dev See `IRelayRecipient.preRelayedCall`.
      *
-     * This function should not be overriden directly, use `_preRelayedCall` instead.
+     * This function should not be overridden directly, use `_preRelayedCall` instead.
      *
      * * Requirements:
      *
@@ -138,7 +138,7 @@ abstract contract GSNRecipient is IRelayRecipient, Context {
     /**
      * @dev See `IRelayRecipient.postRelayedCall`.
      *
-     * This function should not be overriden directly, use `_postRelayedCall` instead.
+     * This function should not be overridden directly, use `_postRelayedCall` instead.
      *
      * * Requirements:
      *

contracts/GSN/IRelayRecipient.sol

@@ -53,7 +53,7 @@ interface IRelayRecipient {
      *
      * Returns a value to be passed to {postRelayedCall}.
      *
-     * {preRelayedCall} is called with 100k gas: if it runs out during exection or otherwise reverts, the relayed call
+     * {preRelayedCall} is called with 100k gas: if it runs out during execution or otherwise reverts, the relayed call
      * will not be executed, but the recipient will still be charged for the transaction's cost.
      */
     function preRelayedCall(bytes calldata context) external returns (bytes32);

contracts/token/ERC1155/ERC1155.sol

@@ -28,7 +28,7 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
     // Mapping from account to operator approvals
     mapping (address => mapping(address => bool)) private _operatorApprovals;
 
-    // Used as the URI for all token types by relying on ID substition, e.g. https://token-cdn-domain/{id}.json
+    // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
     string private _uri;
 
     /*
@@ -66,7 +66,7 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
      * @dev See {IERC1155MetadataURI-uri}.
      *
      * This implementation returns the same URI for *all* token types. It relies
-     * on the token type ID substituion mechanism
+     * on the token type ID substitution mechanism
      * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
      *
      * Clients calling this function must replace the `\{id\}` substring with the
@@ -208,10 +208,10 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
 
     /**
      * @dev Sets a new URI for all token types, by relying on the token type ID
-     * substituion mechanism
+     * substitution mechanism
      * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
      *
-     * By this mechanism, any occurence of the `\{id\}` substring in either the
+     * By this mechanism, any occurrence of the `\{id\}` substring in either the
      * URI or any of the amounts in the JSON file at said URI will be replaced by
      * clients with the token type ID.
      *

contracts/token/ERC1155/IERC1155.sol

@@ -12,7 +12,7 @@ import "../../introspection/IERC165.sol";
  */
 interface IERC1155 is IERC165 {
     /**
-     * @dev Emitted when `value` tokens of token type `id` are transfered from `from` to `to` by `operator`.
+     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
      */
     event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
 

contracts/token/ERC721/ERC721.sol

@@ -254,7 +254,7 @@ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable
      * `_data` is additional data, it has no specified format and it is sent in call to `to`.
      *
      * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
-     * implement alternative mecanisms to perform token transfer, such as signature-based.
+     * implement alternative mechanisms to perform token transfer, such as signature-based.
      *
      * Requirements:
      *

contracts/token/ERC721/IERC721.sol

@@ -9,7 +9,7 @@ import "../../introspection/IERC165.sol";
  */
 interface IERC721 is IERC165 {
     /**
-     * @dev Emitted when `tokenId` token is transfered from `from` to `to`.
+     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
      */
     event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
 

contracts/utils/README.adoc

@@ -7,7 +7,7 @@ Miscellaneous contracts and libraries containing utility functions you can use t
 
 Security tools include:
 
- * {Pausable}: provides a simple way to halt activity in your contracts (often in reponse to an external threat).
+ * {Pausable}: provides a simple way to halt activity in your contracts (often in response to an external threat).
  * {ReentrancyGuard}: protects you from https://blog.openzeppelin.com/reentrancy-after-istanbul/[reentrant calls].
 
 The {Address}, {Arrays} and {Strings} libraries provide more operations related to these native data types, while {SafeCast} adds ways to safely convert between the different signed and unsigned numeric types.

test/helpers/sign.js

@@ -38,7 +38,7 @@ const getSignFor = (contract, signer) => (redeemer, methodName, methodArgs = [])
     redeemer,
   ];
 
-  const REAL_SIGNATURE_SIZE = 2 * 65; // 65 bytes in hexadecimal string legnth
+  const REAL_SIGNATURE_SIZE = 2 * 65; // 65 bytes in hexadecimal string length
   const PADDED_SIGNATURE_SIZE = 2 * 96; // 96 bytes in hexadecimal string length
   const DUMMY_SIGNATURE = `0x${web3.utils.padLeft('', REAL_SIGNATURE_SIZE)}`;