Fix markdown

The table tag needs at least 3 dashes in the header line.

history/block-version.md

@@ -1,8 +1,9 @@
 # Block Version History
+
 | Version Number | Proposed In | Released | Summary |
-|--|--|---|
+| -------------- | ----------- | -------- | ------- |
 |||Aug 2017| Bitcoin Cash hard fork.|
 |4|[BIP-0065](/history/bips)| Nov 2015<br>Bitcoin Core 0.11.2| Added support for `OP_CHECKLOCKTIMEVERIFY` opcode.|
 |3|[BIP-0066](/history/bips)|Jul 2015<br>Bitcoin Core 0.10.0| Added enforcement of DER encoding of all ECDSA signatures in new blocks.|
 |2|[BIP-0034](/history/bips)|Sep 2012<br>Bitcoin Core 0.7.0| Added the block height within the block coinbase.|
-|1||Jan 2009|The format used in the genesis block.|
+|1||Jan 2009|The format used in the genesis block.|

history/protocol-version.md

@@ -1,6 +1,7 @@
 # Network Protocol Version History
+
 | Version Number | Proposed In | Released | Summary |
-|--|--|---|
+| -------------- | ----------- | -------- | ------- |
 |||Aug 2017| Bitcoin Cash hard fork.|
 |70 015|[BIP-0152](/history/bips)|Jun 2017<BR>Bitcoin Core 0.14.2|Modified banning behaviour for invalid compact blocks.|
 |70 012| [BIP-0130](/history/bips)|Nov 2016<BR>Bitcoin Core 0.12.0| Added `sendheaders` message.|
@@ -14,4 +15,4 @@
 |31 402|  | Oct 2010<br> Bitcoin Core 0.3.15| Time field added to `address` messages. |
 | 311 ||Aug 2010<Br>Bitcoin Core 0.3.11| Added `alert` message.|
 | 209 |  |May 2010<br>Bitcoin Core 0.2.9 | `address` message may accept a list of network addresses. Added checksum field to message headers.|
-| 106 |  | Oct 2009<br> Bitcoin Core 0.1.6 | Added the following fields to the `version` message: `address-from`, `nonce`, `user-agent`, `current block height`. |
+| 106 |  | Oct 2009<br> Bitcoin Core 0.1.6 | Added the following fields to the `version` message: `address-from`, `nonce`, `user-agent`, `current block height`. |

history/transaction-version.md

@@ -1,6 +1,7 @@
 # Transaction Version History
+
 | Version Number | Proposed In | Released | Summary |
-|--|--|---|
+| -------------- | ----------- | -------- | ------- |
 |||Aug 2017| Bitcoin Cash hard fork.|
 |2|[BIP-0068](/history/bips)|May 2016<br>Bitcoin Core 0.12.1|Added relative lock-time (RLT) consensus-enforced semantics of the transaction input sequence number field.|
-|1|||As used in the genesis block.|
+|1|||As used in the genesis block.|