commands/plugin: style nitpick

plugins/commands/plugin/action/install_gem.rb

@@ -1,5 +1,6 @@
 require "rubygems"
 require "rubygems/dependency_installer"
+
 begin
   require "rubygems/format"
 rescue LoadError
@@ -31,10 +32,13 @@ module VagrantPlugins
             # If we're installing from a gem file, determine the name
             # based on the spec in the file.
             pkg = if defined?(Gem::Format)
+              # RubyGems 1.x
               Gem::Format.from_file_by_path(plugin_name)
             else
+              # RubyGems 2.x
               Gem::Package.new(plugin_name)
             end
+
             find_plugin_name = pkg.spec.name
             version = pkg.spec.version
           end

plugins/commands/plugin/action/prune_gems.rb

@@ -126,8 +126,8 @@ module VagrantPlugins
 
           if prune_specs.length > 0
             env[:gem_helper].with_environment do
-
-              # due to a bug in rubygems 2.0, we need to load the specifications before removing any
+              # Due to a bug in rubygems 2.0, we need to load the
+              # specifications before removing any. This achieves that.
               Gem::Specification.to_a
 
               prune_specs.each do |prune_spec|