Add new rbs-inline hover scenario

Author: whtsht

scenario/rbs/inline-hover.rb

@@ -9,3 +9,17 @@ def check(var)
 
 ## hover: test.rb:3:3
 Integer
+
+## update: test2.rb
+class Foo
+  #: (String) -> void
+  def bar(x)
+    x
+  end
+end
+
+## hover: test2.rb:3:10
+String
+
+## hover: test2.rb:4:4
+String