Remove various warnings about unused variables in the test suite.

test/TC_FXApp.rb

@@ -8,7 +8,7 @@ class TC_FXApp < Test::Unit::TestCase
 
   def test_exception_for_second_app
     assert_raise RuntimeError do
-      app2 = FXApp.new
+      FXApp.new
     end
   end
 end
@@ -46,7 +46,7 @@ class TC_FXApp2 < Fox::TestCase
   end
 
   def test_addInput_on_pipe
-    check_events *IO.pipe
+    check_events(*IO.pipe)
   end
 
   def test_addInput_on_socket_accept

test/TC_FXFont.rb

@@ -15,7 +15,7 @@ class TC_FXFont < Test::Unit::TestCase
 
   def testConstructFromFontDescription
     fontdesc = @app.normalFont.fontDesc
-    font = FXFont.new(@app, fontdesc)
+    FXFont.new(@app, fontdesc)
   end
 
   def testConstructFromParameters
@@ -42,7 +42,7 @@ class TC_FXFont < Test::Unit::TestCase
   end
 
   def testConstructFromFontString
-    font = FXFont.new(@app, "")
+    FXFont.new(@app, "")
   end
 
   def testGetTextWidthAndHeight

test/TC_FXImage.rb

@@ -119,7 +119,7 @@ class TC_FXImage < Fox::TestCase
   def test_create_with_non_owned_data
     GC.stress = true
     img = image_with_non_owned_data
-    " " * 10000
+    _ = " " * 10000
     GC.stress = false
     assert_equal("rgbaRGBA", img.pixel_string)
     assert_equal(0, img.options)
@@ -134,7 +134,7 @@ class TC_FXImage < Fox::TestCase
     img = FXImage.new(app, nil, 0, 1, 2)
     GC.stress = true
     set_non_owned_data(img)
-    " " * 10000
+    _ = " " * 10000
     GC.stress = false
     assert_equal("rgbaRGBA", img.pixel_string)
     assert_equal(0, img.options)

test/TC_FXMat4f.rb

@@ -81,9 +81,9 @@ class TC_FXMat4f < Test::Unit::TestCase
   def test_mul_by_scalar
     p = FXMat4f.new.eye
     q = FXMat4f.new(4.0, 0.0, 0.0, 0.0,
-                   0.0, 4.0, 0.0, 0.0,
-		   0.0, 0.0, 4.0, 0.0,
-		   0.0, 0.0, 0.0, 4.0)
+                    0.0, 4.0, 0.0, 0.0,
+                    0.0, 0.0, 4.0, 0.0,
+                    0.0, 0.0, 0.0, 4.0)
     r = p*4.0
     assert_instance_of(FXMat4f, r)
 #   assert_equal(q, r)

test/TC_FXQuatf.rb

@@ -9,23 +9,23 @@ class TC_FXQuatf < Test::Unit::TestCase
   end
 
   def test_default_constructor
-    q = FXQuatf.new
+    FXQuatf.new
   end
 
   def test_construct_from_axis_and_angle
     axis = FXVec3f.new(1.0, 1.0, 1.0)
-    q = FXQuatf.new(axis)
-    q = FXQuatf.new(axis, 0.0)
+    FXQuatf.new(axis)
+    FXQuatf.new(axis, 0.0)
   end
 
   def test_construct_from_components
     x, y, z, w = 1.0, 1.0, 1.0, 1.0
-    q = FXQuatf.new(x, y, z, w)
+    FXQuatf.new(x, y, z, w)
   end
 
   def test_construct_from_roll_pitch_yaw
     roll, pitch, yaw = 45.0, 45.0, 45.0
-    q = FXQuatf.new(roll, pitch, yaw)
+    FXQuatf.new(roll, pitch, yaw)
   end
 
   def test_adjust!

test/TC_FXRegion.rb

@@ -17,9 +17,9 @@ class TC_FXRegion < Test::Unit::TestCase
                FXPoint.new(100, 100),
                FXPoint.new(0, 0)
              ]
-    r1 = FXRegion.new(points, true)
-    r2 = FXRegion.new(points, false)
-    r3 = FXRegion.new(points)
+    FXRegion.new(points, true)
+    FXRegion.new(points, false)
+    FXRegion.new(points)
   end
 
   def test_copy_constructor

test/TC_FXShell.rb

@@ -22,6 +22,7 @@ class TC_FXShell < Test::Unit::TestCase
   def test_new
     # Free-floating
     shell1 = FXShell.new(@app, 0, 0, 0, 0, 0)
+    assert_nil(shell1.owner)
 
     # Owned
     shell2 = FXShell.new(@mainWin, 0, 0, 0, 0, 0)

test/TC_FXTable.rb

@@ -76,7 +76,7 @@ private
     clearEdges(extending)
 
     old_nr = @table.numRows
-    old_nc = @table.numColumns
+    _old_nc = @table.numColumns
 
     # resize the table
     nr = @data_lines.size + 2

test/TC_FXVec4f.rb

@@ -39,7 +39,7 @@ class TC_FXVec4f < Test::Unit::TestCase
   end
 
   def test_new5
-    c = FXVec4f.new(FXRGB(128, 128, 128))
+    FXVec4f.new(FXRGB(128, 128, 128))
   end
 
   def test_getitem