message: docs(rpc): fix layout and remove repeated doc
diff: # get_block
  -Returns information about a block by hash.
  +Returns the information about a block by hash.
  ## Parameters
  @@ -126,11 +126,11 @@ curl -d '{"id": 2, "jsonrpc": "2.0", "method":"get_transaction","params": ["0xbd
  # get_block_hash
  -Returns hash of block in best-block-chain at <index>; index 0 is the genesis block.
  +Returns the hash of a block in the best-block-chain by block number; Block of No. 0 is the genesis block.
  ## Parameters
  - BlockNumber - number of a block.
  + BlockNumber - Number of a block.
  ## Examples
  @@ -148,7 +148,7 @@ curl -d '{"id": 2, "jsonrpc": "2.0", "method":"get_block_hash","params": [1]}' -
  # get_tip_header
  -Returns the information about the longest block chain tip header.
  +Returns the information about the tip header of the longest.
  ## Examples
  @@ -181,17 +181,15 @@ curl -d '{"id": 2, "jsonrpc": "2.0", "method":"get_tip_header","params": []}' -H
  }
  ```
  -
  -
  # get_cells_by_type_hash
  Returns the information about cells collection by type_hash.
  ## Parameters
  - type_hash - cell type_hash.
  - from - start BlockNumber.
  - to - end BlockNumber.
  + Type_hash - Cell type_hash.
  + From - Start BlockNumber.
  + To - End BlockNumber.
  ## Examples
  @@ -251,7 +249,7 @@ curl -d '{"id": 2, "jsonrpc": "2.0", "method":"get_cells_by_type_hash","params":
  # get_current_cell
  -Returns the information about cell by out_point.
  +Returns the information about a cell by out_point.
  ## Parameters
  @@ -299,26 +297,7 @@ curl -d '{"id": 2, "jsonrpc": "2.0", "method":"get_tip_block_number","params": [
  # local_node_id
  -Returns local node id.
  -
  -## Examples
  -
  -```shell
  -curl -d '{"id": 2, "jsonrpc": "2.0", "method":"local_node_id","params": []}' -H 'content-type:application/json' 'http://localhost:8114'
  -```
  -
  -```json
  -{
  - "jsonrpc": "2.0",
  - "result": "/ip4/0.0.0.0/tcp/8115/p2p/QmdSxB6iTcbhj6gbZNthvJrwRkJrwnsohNpVixY4FtcZwv",
  - "id": 2
  -}
  -```
  -
  -
  -# local_node_id
  -
  -Returns local node id.
  +Returns the local node id.
  ## Examples
  @@ -341,10 +320,11 @@ Creates new transaction.
  ## Parameters
  Transaction - The transaction object.
  - version - transaction version.
  - deps - dependent cell
  - inputs - transaction inputs.
  - outputs - transaction outputs.
  +
  + Version - Transaction version.
  + Deps - Dependent cells.
  + Inputs - Transaction inputs.
  + Outputs - Transaction outputs.
  ## Examples
  