5 files changed, 6 insertions, 6 deletions
diff --git a/lib/rubygems/ext/builder.rb b/lib/rubygems/ext/builder.rb
index 9ddcf988e5..02ca000984 100644
--- a/lib/rubygems/ext/builder.rb
+++ b/lib/rubygems/ext/builder.rb
@@ -26,7 +26,7 @@ class Gem::Ext::Builder
     RbConfig::CONFIG["configure_args"] =~ /with-make-prog\=(\w+)/
     make_program_name = ENV["MAKE"] || ENV["make"] || $1
     unless make_program_name
-      make_program_name = (RUBY_PLATFORM.include?("mswin")) ? "nmake" : "make"
+      make_program_name = RUBY_PLATFORM.include?("mswin") ? "nmake" : "make"
     end
     make_program = Shellwords.split(make_program_name)
 
diff --git a/lib/rubygems/remote_fetcher.rb b/lib/rubygems/remote_fetcher.rb
index 6af0fea00f..5a0898f084 100644
--- a/lib/rubygems/remote_fetcher.rb
+++ b/lib/rubygems/remote_fetcher.rb
@@ -114,7 +114,7 @@ class Gem::RemoteFetcher
     cache_dir =
       if Dir.pwd == install_dir # see fetch_command
         install_dir
-      elsif File.writable?(install_cache_dir) || (File.writable?(install_dir) && (!File.exist?(install_cache_dir)))
+      elsif File.writable?(install_cache_dir) || (File.writable?(install_dir) && !File.exist?(install_cache_dir))
         install_cache_dir
       else
         File.join Gem.user_dir, "cache"
diff --git a/lib/rubygems/s3_uri_signer.rb b/lib/rubygems/s3_uri_signer.rb
index c13852337b..911468024d 100644
--- a/lib/rubygems/s3_uri_signer.rb
+++ b/lib/rubygems/s3_uri_signer.rb
@@ -10,7 +10,7 @@ class Gem::S3URISigner
     end
 
     def to_s # :nodoc:
-      (super).to_s
+      super.to_s
     end
   end
 
@@ -20,7 +20,7 @@ class Gem::S3URISigner
     end
 
     def to_s # :nodoc:
-      (super).to_s
+      super.to_s
     end
   end
 
diff --git a/test/rubygems/test_gem_package_tar_writer.rb b/test/rubygems/test_gem_package_tar_writer.rb
index 7bcf90012b..84869bdae1 100644
--- a/test/rubygems/test_gem_package_tar_writer.rb
+++ b/test/rubygems/test_gem_package_tar_writer.rb
@@ -282,7 +282,7 @@ class TestGemPackageTarWriter < Gem::Package::TarTestCase
     ]
     names.each do |name|
       newname, prefix = @tar_writer.split_name(name)
-      assert(!(newname.empty?), "split_name() returned empty name")
+      assert(!newname.empty?, "split_name() returned empty name")
       assert(newname.bytesize <= 100, "split_name() returned name longer than 100 bytes: '#{newname}' for '#{name}'")
       assert(prefix.bytesize <= 155, "split_name() returned prefix longer than 155 bytes: '#{prefix}' for '#{name}'")
       newname = [prefix, newname].join("/") unless prefix.empty?
diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index 6776368dc2..30fa845cc6 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -1199,7 +1199,7 @@ dependencies: []
       s.version = "1"
     end
 
-    spec.instance_variable_set :@licenses, (class << (Object.new);self;end)
+    spec.instance_variable_set :@licenses, (class << Object.new;self;end)
     spec.loaded_from = "/path/to/file"
 
     e = assert_raise Gem::FormatException do