Prefer literal -> lambdas over Kernel#lambda

* I'll take care of fixing the style for new specs.

Author: eregon

.rubocop.yml

@@ -100,3 +100,18 @@ Lint/UriRegexp:
 Lint/Debugger:
   Exclude:
     - 'core/binding/fixtures/irb.rb'
+
+Style/Lambda:
+  Enabled: true
+  EnforcedStyle: literal
+  Exclude:
+    - 'language/lambda_spec.rb'
+    - 'language/proc_spec.rb'
+    - 'core/kernel/lambda_spec.rb'
+
+Style/EmptyLambdaParameter:
+  Enabled: true
+
+Style/StabbyLambdaParentheses:
+  Enabled: true
+  EnforcedStyle: require_no_parentheses

core/argf/close_spec.rb

@@ -22,8 +22,8 @@
 
   it "doesn't raise an IOError if called on a closed stream" do
     argf [@file1_name] do
-      lambda { @argf.close }.should_not raise_error
-      lambda { @argf.close }.should_not raise_error
+      -> { @argf.close }.should_not raise_error
+      -> { @argf.close }.should_not raise_error
     end
   end
 end

core/argf/read_nonblock_spec.rb

@@ -64,7 +64,7 @@
 
       it 'raises IO::EAGAINWaitReadable when empty' do
         argf ['-'] do
-          lambda {
+          -> {
             @argf.read_nonblock(4)
           }.should raise_error(IO::EAGAINWaitReadable)
         end

core/argf/readchar_spec.rb

@@ -13,7 +13,7 @@
 
   it "raises EOFError when end of stream reached" do
     argf [@file1, @file2] do
-      lambda { while @argf.readchar; end }.should raise_error(EOFError)
+      -> { while @argf.readchar; end }.should raise_error(EOFError)
     end
   end
 end

core/argf/readline_spec.rb

@@ -17,7 +17,7 @@
 
   it "raises an EOFError when reaching end of files" do
     argf [@file1, @file2] do
-      lambda { while @argf.readline; end }.should raise_error(EOFError)
+      -> { while @argf.readline; end }.should raise_error(EOFError)
     end
   end
 end

core/argf/readpartial_spec.rb

@@ -16,7 +16,7 @@
 
   it "raises an ArgumentError if called without a maximum read length" do
     argf [@file1_name] do
-      lambda { @argf.readpartial }.should raise_error(ArgumentError)
+      -> { @argf.readpartial }.should raise_error(ArgumentError)
     end
   end
 
@@ -59,8 +59,8 @@
       @argf.readpartial(@file1.size)
       @argf.readpartial(1)
       @argf.readpartial(@file2.size)
-      lambda { @argf.readpartial(1) }.should raise_error(EOFError)
-      lambda { @argf.readpartial(1) }.should raise_error(EOFError)
+      -> { @argf.readpartial(1) }.should raise_error(EOFError)
+      -> { @argf.readpartial(1) }.should raise_error(EOFError)
     end
   end
 

core/argf/rewind_spec.rb

@@ -33,7 +33,7 @@
   it "raises an ArgumentError when end of stream reached" do
     argf [@file1_name, @file2_name] do
       @argf.read
-      lambda { @argf.rewind }.should raise_error(ArgumentError)
+      -> { @argf.rewind }.should raise_error(ArgumentError)
     end
   end
 end

core/argf/seek_spec.rb

@@ -57,7 +57,7 @@
 
   it "takes at least one argument (offset)" do
     argf [@file1_name] do
-      lambda { @argf.seek }.should raise_error(ArgumentError)
+      -> { @argf.seek }.should raise_error(ArgumentError)
     end
   end
 end

core/argf/shared/eof.rb

@@ -18,7 +18,7 @@
   it "raises IOError when called on a closed stream" do
     argf [@file1] do
       @argf.read
-      lambda { @argf.send(@method) }.should raise_error(IOError)
+      -> { @argf.send(@method) }.should raise_error(IOError)
     end
   end
 end

core/argf/shared/fileno.rb

@@ -18,7 +18,7 @@
   it "raises an ArgumentError when called on a closed stream" do
     argf [@file1] do
       @argf.read
-      lambda { @argf.send(@method) }.should raise_error(ArgumentError)
+      -> { @argf.send(@method) }.should raise_error(ArgumentError)
     end
   end
 end