Merge pull request inukshuk#8 from a-fent/proc_new_deprec_warn

Fix warning of deprecation of Proc.new() in Ruby 2.7

lib/wapiti/dataset.rb

@@ -56,9 +56,9 @@ def initialize(sequences = [])
       @sequences = sequences
     end
 
-    def each
+    def each(&block)
       if block_given?
-        sequences.each(&Proc.new)
+        sequences.each(&block)
         self
       else
         to_enum

lib/wapiti/model.rb

@@ -30,7 +30,7 @@ def pattern=(filename)
 
     alias native_label label
 
-    def label(input, opts = nil)
+    def label(input, opts = nil, &block)
       unless opts.nil?
         original_options = options.attributes(opts.keys)
         options.update!(opts)
@@ -39,7 +39,7 @@ def label(input, opts = nil)
       input = input.to_a(tagged: options.check) if input.is_a?(Dataset)
 
       if block_given?
-        output = native_label(input, &Proc.new)
+        output = native_label(input, &block)
       else
         output = native_label(input)
       end
@@ -61,14 +61,14 @@ def check(input)
 
     alias native_train train
 
-    def train(tdat, ddat = nil, opts = nil)
+    def train(tdat, ddat = nil, opts = nil, &block)
       options.update!(opts) unless opts.nil?
 
       tdat = tdat.to_a(tagged: true) if tdat.is_a?(Dataset)
       ddat = ddat.to_a(tagged: true) if ddat.is_a?(Dataset)
 
       if block_given?
-        native_train(tdat, ddat, &Proc.new)
+        native_train(tdat, ddat, &block)
       else
         native_train(tdat, ddat)
       end

lib/wapiti/sequence.rb

@@ -50,9 +50,9 @@ def labels
       tokens.map(&:label).uniq
     end
 
-    def each
+    def each(&block)
       if block_given?
-        tokens.each(&Proc.new)
+        tokens.each(&block)
         self
       else
         to_enum