* remove trailing spaces, append newline at EOF. [ci skip]

spec/ruby/core/array/pack/shared/basic.rb

@@ -31,7 +31,7 @@ describe :array_pack_basic_non_float, shared: true do
     # 2 additional directives ('a') are required for the X directive
     [@obj, @obj, @obj, @obj].pack("aa #{pack_format} # some comment \n#{pack_format}").should be_an_instance_of(String)
   end
-  
+
   ruby_version_is ""..."3.2" do
     it "warns in verbose mode that a directive is unknown" do
       # additional directive ('a') is required for the X directive

spec/ruby/core/string/unpack_spec.rb

@@ -31,4 +31,4 @@ describe "String#unpack" do
       -> { "a".unpack("C", offset: 2) }.should raise_error(ArgumentError, "offset outside of string")
     end
   end
-end
+end

spec/ruby/library/coverage/running_spec.rb

@@ -17,4 +17,4 @@ describe 'Coverage.running?' do
     Coverage.result
     Coverage.running?.should == false
   end
-end
+end

spec/ruby/library/stringio/new_spec.rb

@@ -5,4 +5,4 @@ describe "StringIO.new" do
   it "warns when called with a block" do
     -> { eval("StringIO.new {}") }.should complain(/StringIO::new\(\) does not take block; use StringIO::open\(\) instead/)
   end
-end
+end