fix rubocop moaning

Author: jcupitt

example/inheritance_with_refcount.rb

@@ -21,6 +21,7 @@ def set_debug debug
 
 module Libc
   extend FFI::Library
+
   ffi_lib FFI::Library::LIBC
 
   attach_function :malloc, [:size_t], :pointer
@@ -29,6 +30,7 @@ module Libc
 
 module GLib
   extend FFI::Library
+
   ffi_lib "gobject-2.0"
 
   def self.set_log_domain(_domain)
@@ -142,6 +144,7 @@ def ffi_managed_struct
 
 module Vips
   extend FFI::Library
+
   ffi_lib "vips"
 
   LOG_DOMAIN = "VIPS"

lib/vips/image.rb

@@ -822,10 +822,7 @@ def get_fields
     def get_gainmap
       if Vips.at_least_libvips?(8, 18)
         vi = Vips.vips_image_get_gainmap self
-        return nil if vi.null?
-        Image.new(vi)
-      else
-        nil
+        Image.new(vi) unless vi.null?
       end
     end
 

lib/vips/mutableimage.rb

@@ -12,6 +12,7 @@ module Vips
   # {Vips::Image#mutate}.
   class MutableImage < Vips::Object
     extend Forwardable
+
     alias_method :parent_get_typeof, :get_typeof
     def_instance_delegators :@image, :width, :height, :bands, :format,
       :interpretation, :filename, :xoffset, :yoffset, :xres, :yres, :size,

spec/image_spec.rb

@@ -729,21 +729,26 @@
   # added in 8.18
   if Vips.respond_to? :vips_image_get_gainmap
     it "can modify gainmaps" do
-      image = Vips::Image.new_from_file simg "ultra-hdr.jpg"
       # test the example code in image.rb doc comment for get_gainmap
-      gainmap = image.get_gainmap
-      unless gainmap.nil?
-        new_gainmap = gainmap.crop 0, 0, 10, 10
-        image = image.mutate do |x|
-          x.set_type! Vips::IMAGE_TYPE, "gainmap", new_gainmap
+      def modify_gainmap image
+        gainmap = image.get_gainmap
+        unless gainmap.nil?
+          new_gainmap = gainmap.crop 0, 0, 10, 10
+          image = image.mutate do |x|
+            x.set_type! Vips::IMAGE_TYPE, "gainmap", new_gainmap
+          end
         end
-  
-        buffer = image.write_to_buffer ".jpg"
-        image = Vips::Image.new_from_buffer buffer, ""
-        new_gainmap2 = image.get_gainmap
-  
-        expect(new_gainmap2.width).to eq(10)
+
+        image
       end
+
+      image = Vips::Image.new_from_file simg "ultra-hdr.jpg"
+      image = modify_gainmap image
+      buffer = image.write_to_buffer ".jpg"
+      image2 = Vips::Image.new_from_buffer buffer, ""
+      gainmap2 = image2.get_gainmap
+
+      expect(gainmap2.width).to eq(10)
     end
   end