[ruby/prism] Fix up Ruby docs

https://github.com/ruby/prism/commit/8062849d0d

prism/config.yml

@@ -778,9 +778,9 @@ nodes:
       Represents the use of a case statement.
 
           case true
-      ^^^^^^^^^
           when false
           end
+          ^^^^^^^^^^
   - name: ClassNode
     fields:
       - name: locals
@@ -818,7 +818,7 @@ nodes:
       Represents the use of the `&&=` operator for assignment to a class variable.
 
           @@target &&= value
-          ^^^^^^^^^^^^^^^^
+          ^^^^^^^^^^^^^^^^^^
   - name: ClassVariableOperatorWriteNode
     fields:
       - name: name
@@ -1183,13 +1183,13 @@ nodes:
       Represents a find pattern in pattern matching.
 
           foo in *bar, baz, *qux
-          ^^^^^^^^^^^^^^^^^^^^^^
+                 ^^^^^^^^^^^^^^^
 
           foo in [*bar, baz, *qux]
-          ^^^^^^^^^^^^^^^^^^^^^^^^
+                 ^^^^^^^^^^^^^^^^^
 
           foo in Foo(*bar, baz, *qux)
-          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+                 ^^^^^^^^^^^^^^^^^^^^
   - name: FlipFlopNode
     fields:
       - name: left
@@ -1240,7 +1240,7 @@ nodes:
 
           def foo(...)
             bar(...)
-            ^^^^^^^^
+                ^^^
           end
   - name: ForwardingParameterNode
     comment: |
@@ -2237,8 +2237,8 @@ nodes:
 
           begin
           rescue Foo, *splat, Bar => ex
-          ^^^^^^
             foo
+          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
           end
 
       `Foo, *splat, Bar` are in the `exceptions` field.

prism/templates/lib/prism/serialize.rb.erb

@@ -4,7 +4,7 @@ require "stringio"
 if String.instance_method(:unpack1).parameters.none? { |_, name| name == :offset }
   String.prepend(
     Module.new {
-      def unpack1(format, offset: 0)
+      def unpack1(format, offset: 0) # :nodoc:
         offset == 0 ? super(format) : self[offset..].unpack1(format)
       end
     }