Styling changes

spec/ameba/ast/variabling/type_def_variable_spec.cr

@@ -21,7 +21,8 @@ module Ameba::AST
 
       it "raises if type declaration is incorrect" do
         type_dec = Crystal::TypeDeclaration.new(declared_type, declared_type)
-        expect_raises(Exception, "unsupported var node type: Crystal::Path") do
+
+        expect_raises(Exception, "Unsupported var node type: Crystal::Path") do
           TypeDecVariable.new(type_dec).name
         end
       end

src/ameba/ast/scope.cr

@@ -141,7 +141,7 @@ module Ameba::AST
 
     # Returns `true` if type declaration variable is assigned in this scope.
     def assigns_type_dec?(name)
-      type_dec_variables.any?(&.name.== name) || outer_scope.try(&.assigns_type_dec?(name))
+      type_dec_variables.any?(&.name.== name) || !!outer_scope.try(&.assigns_type_dec?(name))
     end
 
     # Returns `true` if and only if current scope represents some

src/ameba/ast/variabling/type_def_variable.cr

@@ -10,13 +10,11 @@ module Ameba::AST
     end
 
     def name
-      var = @node.var
+      case var = @node.var
-
-      case var
       when Crystal::Var, Crystal::InstanceVar, Crystal::ClassVar, Crystal::Global
         var.name
       else
-        raise "unsupported var node type: #{var.class}"
+        raise "Unsupported var node type: #{var.class}"
       end
     end
   end