Merge pull request #2392 from take-cheeze/doc_update

Update document and add :doc task.

Rakefile

@@ -123,3 +123,8 @@ task :deep_clean => ["clean"] do
   end
   puts "Cleaned up mrbgems build folder"
 end
+
+desc 'generate document'
+task :doc do
+  load "#{MRUBY_ROOT}/doc/language/generator.rb"
+end

doc/language/Core.md

@@ -1328,6 +1328,12 @@ ISO Code | Source File | C Function
 --- | --- | ---
 15.3.1.2.5 | src/kernel.c | mrb_f_block_given_p_m
 
+#### local_variables
+
+ISO Code | Source File | C Function
+--- | --- | ---
+15.3.1.2.7 | src/kernel.c | mrb_local_variables
+
 #### raise
 
 ISO Code | Source File | C Function
@@ -1498,6 +1504,12 @@ ISO Code | Source File | C Function
 --- | --- | ---
 15.3.1.3.26 | src/kernel.c | mrb_obj_is_kind_of_m
 
+#### local_variables
+
+ISO Code | Source File | C Function
+--- | --- | ---
+15.3.1.3.28 | src/kernel.c | mrb_local_variables
+
 #### methods
 
 ISO Code | Source File | C Function