Merge pull request #4494 from shuujii/clarify-mruby-kernel-object-ext-gem-summary

Clarify `mruby-(kernel|object)-ext` gem summary; ref 8e637bdd [ci skip]

mrbgems/mruby-kernel-ext/mrbgem.rake

@@ -1,5 +1,5 @@
 MRuby::Gem::Specification.new('mruby-kernel-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
-  spec.summary = 'Kernel module extension'
+  spec.summary = 'extensional function-like methods'
 end

mrbgems/mruby-object-ext/mrbgem.rake

@@ -1,5 +1,5 @@
 MRuby::Gem::Specification.new('mruby-object-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
-  spec.summary = 'Object class extension'
+  spec.summary = 'extensional methods shared by all objects'
 end