Minor changes to text for consistency and grammar.

EIPS/eip-1155.md

@@ -189,7 +189,8 @@ interface ERC1155TokenReceiver {
 
     /**
         @notice Indicates whether a contract implements the `ERC1155TokenReceiver` functions and so can accept ERC1155 token types.
-        @dev This function MUST return `bytes4(keccak256("isERC1155TokenReceiver()"))` (i.e. 0x0d912442). and MUST not consume more than 5,000 gas.                  
+        @dev This function MUST return `bytes4(keccak256("isERC1155TokenReceiver()"))` (i.e. 0x0d912442). 
+        This function MUST NOT consume more than 5,000 gas.                  
         @return           `bytes4(keccak256("isERC1155TokenReceiver()"))`
     */
     function isERC1155TokenReceiver() external pure returns (bytes4);
@@ -251,7 +252,7 @@ To be more explicit about how safeTransferFrom and safeBatchTransferFrom MUST op
 * MUST revert if length of `_ids` is not the same as length of `_values`.
 * MUST revert if any of the balance(s) of the holder(s) for token(s) in `_ids` is lower than the respective amount(s) in `_values` sent to the recipient.
 * MUST revert on any other error.
-* After the above conditions are met, this function MUST check if `_to` is a smart contract (eg. code size > 0). If so, it MUST call `onERC1155Received` or `onERC1155BatchReceived` as on `_to` and act appropriately (see "`onERC1155Received` and onERC1155BatchReceived rules" section).
+* After the above conditions are met, this function MUST check if `_to` is a smart contract (eg. code size > 0). If so, it MUST call `onERC1155Received` or `onERC1155BatchReceived` on `_to` and act appropriately (see "`onERC1155Received` and onERC1155BatchReceived rules" section).
 * MUST emit `TransferSingle` or `TransferBatch` event(s) on transfer success (see "TransferSingle and TransferBatch event rules" section).
 * Transfers and events MUST occur in the array order they were submitted (_ids[0]/_values[0] before _ids[1]/_values[1], etc).
 
@@ -317,9 +318,9 @@ To be more explicit about how safeTransferFrom and safeBatchTransferFrom MUST op
         return 0x0d912442; // bytes4(keccak256("isERC1155TokenReceiver()"))
     }
     ```
-* The implementation MAY differ from the above but :
-  - it MUST return the same value.
-  - it MUST not spend more than 5,000 gas
+* The implementation MAY differ from the above but:
+  - It MUST return the same value.
+  - It MUST NOT consume more than 5,000 gas.
 
 **_Implementation specific transfer api rules:_**
 * If implementation specific api functions are used to transfer 1155 tokens to a contract, the safeTransferFrom, or safeBatchTransferFrom (as appropriate) rules MUST be followed.