spec: Handlers table reformat.

spec/README.md

@@ -329,26 +329,27 @@ request                 All information related to the HTTP request. Read-Only
 ├──── method          Used HTTP Method (GET, POST)
 ├──── path            Complete URL path.
 ├──── match           Previously matched URL path parts.
-│   └────   .*
+│     └──── <key>
 ├──── param           URL parameters (post ? symbol)
-│   └────   .*
+│     └──── <key>
 ├──── header          HTTP request headers
-│   └────   .*
+│     └──── <key>
 ├──── cookie          HTTP request cookie
-│   └────   .*
+│     └──── <key>
 ├──── form            form-encoding body data
-│   └────   .*
-├────   body            HTTP request body
+│     └──── <key>
+└──── body            HTTP request body
+
 response              All information related to the HTTP request. Write-Only
 ├──── status          HTTP status code
 ├──── body            Response body. Mutually exclusive with response/stream
 ├──── stream          Chunk-encoded body. Streamed response. Mutually exclusive with response/body
-├────   header          HTTP response headers
-└────   └────   .*
+└──── header          HTTP response headers
+      └──── <key>
 ```
 
-**Note**: Parameters under `request` are read-only and, conversely, parameters
-under `response` are write-only.
+**Note**: Parameters under `request` are read-only and, conversely, parameters under
+`response` are write-only.
 
 #### Get handler key