Fix mediawiki table formatting

bip-invoicerequest-extension.mediawiki

@@ -26,7 +26,7 @@ Additionally, this extension allows for the requestor of a PaymentRequest to sup
 to facilitate identification for address release.
 
 ==Definitions==
-{|
+{| class="wikitable"
 | Requestor || Entity Requesting ReturnPaymentRequest
 -
 | Responder || Entity Creating and Returning ReturnPaymentRequest
@@ -37,8 +37,8 @@ to facilitate identification for address release.
 |}
 
 ===Acronyms===
-{|
-| <b>Acronym</b> || <b>Expanded</b> || <b>Description</b>
+{| class="wikitable"
+! Acronym !! Expanded !! Description
 -
 | IR || InvoiceRequest || A request to create a PaymentRequest
 -
@@ -61,8 +61,8 @@ message InvoiceRequest {
 }
 </pre>
 
-{|
-| <b>Field Name</b> || <b>Description</b>
+{| class="wikitable"
+! Field Name !! Description
 -
 | sender_public_key     || Sender's EC Public Key
 -
@@ -89,8 +89,8 @@ The new ReturnPaymentRequest message is an encapsulating message that allows the
          required bytes payment_request_hash = 4;
  }
 </pre>
-{|
-| <b>Field Name</b> || <b>Description</b>
+{| class="wikitable"
+! Field Name</b> !! Description
 -
 | encrypted_payment_request || AES-256-CBC Encrypted PaymentRequest
 -