fix: rename blockNum to blknum consistently

plasma_framework/contracts/src/framework/BlockController.sol

@@ -24,7 +24,7 @@ contract BlockController is OnlyFromAddress, VaultRegistry {
     mapping (uint256 => BlockModel.Block) public blocks; // block number => Block data
 
     event BlockSubmitted(
-        uint256 blockNumber
+        uint256 blknum
     );
 
     event ChildChainActivated(

plasma_framework/contracts/src/utils/PosLib.sol

@@ -3,8 +3,8 @@ pragma solidity 0.5.11;
 import "openzeppelin-solidity/contracts/math/SafeMath.sol";
 
 /**
- * @dev UTXO position = (blockNumber * BLOCK_OFFSET + txIndex * TX_OFFSET + outputIndex).
- * TX position = (blockNumber * BLOCK_OFFSET + txIndex * TX_OFFSET)
+ * @dev UTXO position = (blknum * BLOCK_OFFSET + txIndex * TX_OFFSET + outputIndex).
+ * TX position = (blknum * BLOCK_OFFSET + txIndex * TX_OFFSET)
  */
 library PosLib {
     struct Position {

plasma_framework/docs/contracts/BlockController.md

@@ -25,7 +25,7 @@ mapping(uint256 => struct BlockModel.Block) public blocks;
 **Events**
 
 ```js
-event BlockSubmitted(uint256  blockNumber);
+event BlockSubmitted(uint256  blknum);
 event ChildChainActivated(address  authority);
 ```
 

plasma_framework/docs/contracts/PosLib.md

@@ -4,8 +4,8 @@ View Source: [contracts/src/utils/PosLib.sol](../../contracts/src/utils/PosLib.s
 
 **PosLib**
 
-UTXO position = (blockNumber * BLOCK_OFFSET + txIndex * TX_OFFSET + outputIndex).
-TX position = (blockNumber * BLOCK_OFFSET + txIndex * TX_OFFSET)
+UTXO position = (blknum * BLOCK_OFFSET + txIndex * TX_OFFSET + outputIndex).
+TX position = (blknum * BLOCK_OFFSET + txIndex * TX_OFFSET)
 
 ## Structs
 ### Position

plasma_framework/docs/integration-docs/integration-doc.md

@@ -46,7 +46,7 @@ On success, the PlasmaFramework contract emits a `BlockSubmitted` event:
 
 ```
 event BlockSubmitted(
-    uint256 blockNumber
+    uint256 blknum
 );  
 ``` 
 
@@ -84,7 +84,7 @@ Where
 txType ::= uint256
 input ::= outputId | outputPosition
 outputId ::= hash of the transaction that produced the output concatenated with the outputIndex
-outputPosition ::= 32 byte string that is (blockNumber * BLOCK_OFFSET + txIndex * TX_OFFSET + outputIndex)
+outputPosition ::= 32 byte string that is (blknum * BLOCK_OFFSET + txIndex * TX_OFFSET + outputIndex)
 output ::= outputType outputData
 outputType ::= uint256
 outputData ::= undefined, to be defined by concrete transaction types
@@ -1269,13 +1269,13 @@ Watchers monitor the network and send alerts so that users know when they need t
 A new Plasma Block has been submitted. Watcher should fetch block data from child chain and verify that it matches block data published to the Plasma contract on the root chain.
 ```
 event BlockSubmitted(
-    uint256 blockNumber
+    uint256 blknum
 );
 ```
 
 Fetching block data from `PlasmaFramework`:
 ```
-block = PlasmaFramework.blocks(blockNumber)
+block = PlasmaFramework.blocks(blknum)
 ```
 where block is:
 ```

plasma_framework/test/src/framework/BlockController.test.js

@@ -144,7 +144,7 @@ contract('BlockController', ([maintainer, authority, other]) => {
 
         it('emits "BlockSubmitted" event', async () => {
             const tx = await this.blockController.submitBlock(this.dummyBlockHash, { from: authority });
-            await expectEvent.inLogs(tx.logs, 'BlockSubmitted', { blockNumber: new BN(this.childBlockInterval) });
+            await expectEvent.inLogs(tx.logs, 'BlockSubmitted', { blknum: new BN(this.childBlockInterval) });
         });
 
         it('reverts when not called by authority', async () => {