Clean up API presentation take 2

CHIPs/chip-0027.md

@@ -206,7 +206,7 @@ Defined on a case-by-case basis.
 ```
 
 **RETURNS**
-```json
+```py
 {
   "unsigned_transactions": [<unsigned_transaction>]
 }
@@ -217,14 +217,14 @@ Defined on a case-by-case basis.
 #### `gather_signing_info`
 
 **ARGUMENTS**
-```json
+```py
 {
   "spends": [<spend>]
 }
 ```
 
 **RETURNS**
-```json
+```py
 {
   "signing_instructions": <signing_instructions>
 }
@@ -235,15 +235,15 @@ Defined on a case-by-case basis.
 #### `apply_signatures`
 
 **ARGUMENTS**
-```json
+```py
 {
   "spends": [<spend>]
   "signing_responses": [<signing_response>]
 }
 ```
 
 **RETURNS**
-```json
+```py
 {
   "signed_transactions": [<signed_transaction>]
 }
@@ -254,16 +254,16 @@ Defined on a case-by-case basis.
 #### `submit_transactions`
 
 **ARGUMENTS**
-```json
+```py
 {
   "signed_transactions": [<signed_transaction>]
 }
 ```
 
 **RETURNS**
-```json
+```py
 {
-  "mempool_ids": [...],
+  "mempool_ids": ["..."],
 }
 ```