Auto merge of #5456 - Shekharrajak:5452_bundle_inject_options, r=colby-swandale

`bundle inject` with source and group options

Fixes https://github.com/bundler/bundler/issues/5452

Eg

```
$ bundle inject "bootstrap" ">0" --source=https://rubygems.org --group=development
Fetching gem metadata from https://rubygems.org/............
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.
Fetching gem metadata from https://rubygems.org/.............
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.
Added to Gemfile:
  bootstrap (> 0), group => [:development], :source => 'https://rubygems.org'
```

In GemFile

```
gem 'bootstrap', '> 0', :group => [:development], :source => 'https://rubygems.org'
```

### Multiple group :

```
$ dbundle inject "bootstrap" ">0" --source=https://rubygems.org --group=development,production
Fetching gem metadata from https://rubygems.org/............

Added to Gemfile:
gem 'bootstrap', '> 0', :group => [:development, :production], :source => 'https://rubygems.org'

```
In gemfile

```
# Added at 2017-03-24 11:40:51 +0530 by shekharrajak:
gem 'bootstrap', '> 0', :group => [:development, :production], :source => 'https://rubygems.org'
```

1 files changed, 8 insertions, 2 deletions

diff --git a/lib/bundler/cli/inject.rb b/lib/bundler/cli/inject.rb
index cf35e4985b..b17292643f 100644
--- a/lib/bundler/cli/inject.rb
+++ b/lib/bundler/cli/inject.rb
@@ -6,7 +6,7 @@ module Bundler
       @options = options
       @name = name
       @version = version || last_version_number
-      @group = options[:group]
+      @group = options[:group].split(",") unless options[:group].nil?
       @source = options[:source]
       @gems = []
     end
@@ -31,7 +31,13 @@ module Bundler
 
       if added.any?
         Bundler.ui.confirm "Added to Gemfile:"
-        Bundler.ui.confirm added.map {|g| "  #{g}" }.join("\n")
+        Bundler.ui.confirm(added.map do |d|
+          name = "'#{d.name}'"
+          requirement = ", '#{d.requirement}'"
+          group = ", :group => #{d.groups.inspect}" if d.groups != Array(:default)
+          source = ", :source => '#{d.source}'" unless d.source.nil?
+          %(gem #{name}#{requirement}#{group}#{source})
+        end.join("\n"))
       else
         Bundler.ui.confirm "All gems were already present in the Gemfile"
       end