[ruby/prism] Review config.yml: documentation, types and field names

https://github.com/ruby/prism/commit/d43333539e

prism/config.yml

@@ -774,15 +774,25 @@ nodes:
     fields:
       - name: new_name
         type: node
+        kind:
+          - GlobalVariableReadNode
+          - BackReferenceReadNode
+          - NumberedReferenceReadNode
         comment: |
-          Represents the new name of the global variable that can be used after aliasing. This can be either a global variable, a back reference, or a numbered reference.
+          Represents the new name of the global variable that can be used after aliasing.
 
               alias $foo $bar
                     ^^^^
       - name: old_name
         type: node
+        kind:
+          - GlobalVariableReadNode
+          - BackReferenceReadNode
+          - NumberedReferenceReadNode
+          - SymbolNode # On parsing error of `alias $a b`
+          - MissingNode # On parsing error of `alias $a 42`
         comment: |
-          Represents the old name of the global variable that could be used before aliasing. This can be either a global variable, a back reference, or a numbered reference.
+          Represents the old name of the global variable that can be used before aliasing.
 
               alias $foo $bar
                          ^^^^
@@ -802,8 +812,16 @@ nodes:
     fields:
       - name: new_name
         type: node
+        kind:
+          - SymbolNode
+          - InterpolatedSymbolNode
       - name: old_name
         type: node
+        kind:
+          - SymbolNode
+          - InterpolatedSymbolNode
+          - GlobalVariableReadNode # On parsing error of `alias a $b`
+          - MissingNode # On parsing error of `alias a 42`
       - name: keyword_loc
         type: location
     comment: |
@@ -1034,7 +1052,7 @@ nodes:
       - name: operator_loc
         type: location
     comment: |
-      Represents block method arguments.
+      Represents a block argument using `&`.
 
           bar(&args)
           ^^^^^^^^^^
@@ -1054,8 +1072,15 @@ nodes:
         type: constant[]
       - name: parameters
         type: node?
+        kind:
+          - BlockParametersNode
+          - NumberedParametersNode
+          - ItParametersNode
       - name: body
         type: node?
+        kind:
+          - StatementsNode
+          - BeginNode
       - name: opening_loc
         type: location
       - name: closing_loc
@@ -1075,7 +1100,7 @@ nodes:
       - name: operator_loc
         type: location
     comment: |
-      Represents a block parameter to a method, block, or lambda definition.
+      Represents a block parameter of a method, block, or lambda definition.
 
           def a(&b)
                 ^^
@@ -2164,6 +2189,9 @@ nodes:
               end
       - name: consequent
         type: node?
+        kind:
+          - ElseNode
+          - IfNode
         comment: |
           Represents an `ElseNode` or an `IfNode` when there is an `else` or an `elsif` in the `if` statement.