diff --git a/benchmarks/antialias_best.rb b/benchmarks/antialias_best.rb
index ef8448f..198fce4 100644
--- a/benchmarks/antialias_best.rb
+++ b/benchmarks/antialias_best.rb
@@ -10,4 +10,4 @@ Squib::Deck.new(cards: 200, config: 'antialias_best.yml') do
            y: (i / 17) * 50
   end
   save_png prefix: 'antialias_best_'
-end
\ No newline at end of file
+end
diff --git a/benchmarks/antialias_fast.rb b/benchmarks/antialias_fast.rb
index c104af9..00c8f0a 100644
--- a/benchmarks/antialias_fast.rb
+++ b/benchmarks/antialias_fast.rb
@@ -10,4 +10,4 @@ Squib::Deck.new(cards: 200, config: 'antialias_fast.yml') do
            y: (i / 17) * 50
   end
   save_png prefix: 'antialias_fast_'
-end
\ No newline at end of file
+end
diff --git a/benchmarks/backend_memory.rb b/benchmarks/backend_memory.rb
index ff80581..fc5c5ff 100644
--- a/benchmarks/backend_memory.rb
+++ b/benchmarks/backend_memory.rb
@@ -11,4 +11,4 @@ Squib::Deck.new(cards: 200) do
   png        file: 'shiny-purse.png', x: 250, y: 20
   save_png   prefix: 'rasterized_'
   save_pdf   file: 'backend.pdf'
-end
\ No newline at end of file
+end
diff --git a/benchmarks/backend_svg.rb b/benchmarks/backend_svg.rb
index ed8f31f..1fc0e74 100644
--- a/benchmarks/backend_svg.rb
+++ b/benchmarks/backend_svg.rb
@@ -11,4 +11,4 @@ Squib::Deck.new(cards: 200, config: 'backend-svg.yml') do
   png        file: 'shiny-purse.png', x: 250, y: 20
   save_png   prefix: 'rasterized_'
   save_pdf   file: 'backend.pdf'
-end
\ No newline at end of file
+end
diff --git a/benchmarks/tons_of_png.rb b/benchmarks/tons_of_png.rb
index 6cfb9c4..c83639d 100644
--- a/benchmarks/tons_of_png.rb
+++ b/benchmarks/tons_of_png.rb
@@ -3,4 +3,4 @@ require 'squib'
 Squib::Deck.new(cards: 200) do
   png file: 'shiny-purse.png'
   save_png prefix: 'tons_of_png_'
-end
\ No newline at end of file
+end
diff --git a/benchmarks/tons_of_svg.rb b/benchmarks/tons_of_svg.rb
index 24a2bd2..a797d31 100644
--- a/benchmarks/tons_of_svg.rb
+++ b/benchmarks/tons_of_svg.rb
@@ -4,4 +4,4 @@ Squib::Deck.new(cards: 200) do
   svg file: 'spanner.svg',
       width: 400, height: 400
   save_png prefix: 'tons_of_svg_'
-end
\ No newline at end of file
+end
diff --git a/benchmarks/tons_of_text.rb b/benchmarks/tons_of_text.rb
index 3d59510..a68b47b 100644
--- a/benchmarks/tons_of_text.rb
+++ b/benchmarks/tons_of_text.rb
@@ -5,4 +5,4 @@ Squib::Deck.new(cards: 200) do
        font: 'Sans bold 12', width: 825,
        ellipsize: false
   save_png prefix: 'tons_of_text_'
-end
\ No newline at end of file
+end
diff --git a/lib/squib/args/color_validator.rb b/lib/squib/args/color_validator.rb
index e823197..746a897 100644
--- a/lib/squib/args/color_validator.rb
+++ b/lib/squib/args/color_validator.rb
@@ -9,4 +9,4 @@ module Squib
 
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/squib/graphics/gradient_regex.rb b/lib/squib/graphics/gradient_regex.rb
index 8605153..173a11b 100644
--- a/lib/squib/graphics/gradient_regex.rb
+++ b/lib/squib/graphics/gradient_regex.rb
@@ -44,4 +44,4 @@ module Squib
       \s*         # trailing whitespace is ok
     /x
   end
-end
\ No newline at end of file
+end
diff --git a/lib/squib/graphics/shapes.rb b/lib/squib/graphics/shapes.rb
index 5b57eae..ab9f388 100644
--- a/lib/squib/graphics/shapes.rb
+++ b/lib/squib/graphics/shapes.rb
@@ -132,4 +132,3 @@ module Squib
 
   end
 end
-
diff --git a/samples/cairo_access.rb b/samples/cairo_access.rb
index b5d98a2..dd4b21e 100644
--- a/samples/cairo_access.rb
+++ b/samples/cairo_access.rb
@@ -25,4 +25,4 @@ Squib::Deck.new(cards: 2) do
   end
 
   save_png prefix: 'cairo_access_'
-end
\ No newline at end of file
+end
diff --git a/samples/config_text_markup.rb b/samples/config_text_markup.rb
index 42c3007..db7eda7 100644
--- a/samples/config_text_markup.rb
+++ b/samples/config_text_markup.rb
@@ -17,4 +17,4 @@ Squib::Deck.new(config: 'config_disable_quotes.yml') do
        x: 10, y: 10, width: 300, height: 200, font: 'Serif 20',
        markup: true, hint: :cyan
   save_png prefix: 'config_disable_text_'
-end
\ No newline at end of file
+end
diff --git a/samples/gradients.rb b/samples/gradients.rb
index aa588e6..09b5b35 100644
--- a/samples/gradients.rb
+++ b/samples/gradients.rb
@@ -31,4 +31,4 @@ Squib::Deck.new do
        color: '(0,0)(825,0) #000f@0.0 #0000@1.0'
 
   save_png prefix: 'gradient_'
-end
\ No newline at end of file
+end
diff --git a/samples/hand.rb b/samples/hand.rb
index 4897a1f..95d830b 100644
--- a/samples/hand.rb
+++ b/samples/hand.rb
@@ -21,4 +21,3 @@ Squib::Deck.new(cards: 8, layout: 'playing-card.yml') do
   # Tip: you can have the top card be on the left by reversing the range
   #  angle_range: (Math::PI / 4)..(Math::PI / -4)
 end
-
diff --git a/samples/hello_world.rb b/samples/hello_world.rb
index c7d7e56..3599022 100644
--- a/samples/hello_world.rb
+++ b/samples/hello_world.rb
@@ -3,4 +3,4 @@ require 'squib'
 Squib::Deck.new(cards: 2) do
   text str: %w(Hello World!)
   save_png
-end
\ No newline at end of file
+end
diff --git a/samples/showcase.rb b/samples/showcase.rb
index cfc8353..0f4cfcf 100644
--- a/samples/showcase.rb
+++ b/samples/showcase.rb
@@ -22,4 +22,4 @@ Squib::Deck.new(cards: 4) do
            file: 'showcase2.png'
 
   save_png prefix: 'showcase_individual_' # to show that they're not trimmed
-end
\ No newline at end of file
+end
diff --git a/spec/api/api_settings_spec.rb b/spec/api/api_settings_spec.rb
index af0b2e6..6e60345 100644
--- a/spec/api/api_settings_spec.rb
+++ b/spec/api/api_settings_spec.rb
@@ -35,4 +35,4 @@ describe Squib::Deck do
 
   end
 
-end
\ No newline at end of file
+end
diff --git a/spec/args/paint_spec.rb b/spec/args/paint_spec.rb
index 03553b0..f72c6f2 100644
--- a/spec/args/paint_spec.rb
+++ b/spec/args/paint_spec.rb
@@ -19,4 +19,4 @@ describe Squib::Args::Draw do
     end
 
   end
-end
\ No newline at end of file
+end
diff --git a/spec/args/paragraph_spec.rb b/spec/args/paragraph_spec.rb
index a944f9e..d3a8eb7 100644
--- a/spec/args/paragraph_spec.rb
+++ b/spec/args/paragraph_spec.rb
@@ -150,4 +150,4 @@ describe Squib::Args::Paragraph do
     end
   end
 
-end
\ No newline at end of file
+end
diff --git a/spec/args/range_spec.rb b/spec/args/range_spec.rb
index 08e413d..cf1479b 100644
--- a/spec/args/range_spec.rb
+++ b/spec/args/range_spec.rb
@@ -38,4 +38,4 @@ describe Squib::Args::CardRange do
     expect(range.to_a).to eq([])
   end
 
-end
\ No newline at end of file
+end
diff --git a/spec/args/transform_spec.rb b/spec/args/transform_spec.rb
index 31339e8..7bd3fa4 100644
--- a/spec/args/transform_spec.rb
+++ b/spec/args/transform_spec.rb
@@ -22,4 +22,4 @@ describe Squib::Args::Box do
 
   end
 
-end
\ No newline at end of file
+end
diff --git a/spec/args/typographer_spec.rb b/spec/args/typographer_spec.rb
index 98a4c78..ca8c9af 100644
--- a/spec/args/typographer_spec.rb
+++ b/spec/args/typographer_spec.rb
@@ -68,4 +68,4 @@ it 'single quotes inside double quotes' do
 
 
 
-end
\ No newline at end of file
+end
diff --git a/spec/args/unit_conversion_spec.rb b/spec/args/unit_conversion_spec.rb
index 03cea16..82bc248 100644
--- a/spec/args/unit_conversion_spec.rb
+++ b/spec/args/unit_conversion_spec.rb
@@ -19,4 +19,4 @@ describe Squib::Args::UnitConversion do
     expect(subject.parse('1cm')).to eq(118.1102361)
   end
 
-end
\ No newline at end of file
+end
diff --git a/spec/card_spec.rb b/spec/card_spec.rb
index 14e0ebf..3b0cbb0 100644
--- a/spec/card_spec.rb
+++ b/spec/card_spec.rb
@@ -8,4 +8,4 @@ describe Squib::Card do
     expect(Squib::logger).to receive(:fatal).with("Back end not recognized: 'broken robots'")
     expect { Squib::Card.new(deck, 100, 100, 0) }.to raise_error SystemExit
   end
-end
\ No newline at end of file
+end
diff --git a/spec/logger_spec.rb b/spec/logger_spec.rb
index 3bc61bc..15fb7b7 100644
--- a/spec/logger_spec.rb
+++ b/spec/logger_spec.rb
@@ -9,4 +9,4 @@ describe Squib.logger do
     expect($stdout.string).to match /WARN: Test warn/
     $stdout = oldstdout
   end
-end
\ No newline at end of file
+end
diff --git a/spec/samples/sanity.rb b/spec/samples/sanity.rb
index ad65d48..a641408 100644
--- a/spec/samples/sanity.rb
+++ b/spec/samples/sanity.rb
@@ -67,4 +67,4 @@ class Sanity
     end
   end
 
-end
\ No newline at end of file
+end