bundle inject must show the usage when it is used incorrectly

[Shekharrajak]

$ bundle inject 'pry' 1 '>0'
--- ERROR REPORT TEMPLATE -------------------------------------------------------

Error Report

Questions

Please fill out answers to these questions, it'll help us figure out
why things are going wrong.

• What did you do?

  I ran the command bundle inject 'pry' 1 '>0'

• What did you expect to happen?

  I expected Bundler to show error message saying the correct format and usage of bundle inject.

• What happened instead?

  Showing to open an issue

• Have you tried any solutions posted on similar issues in our issue tracker, stack overflow, or google?

Asked in slack channel.

• Have you read our issues document, https://github.com/bundler/bundler/blob/master/ISSUES.md?

  yes

Backtrace

NoMethodError: undefined method `start_with?' for nil:NilClass
  /Users/bundler/lib/bundler/cli/inject.rb:23:in `block (2 levels) in run'
  /Users/bundler/lib/bundler/cli/inject.rb:23:in `any?'
  /Users/bundler/lib/bundler/cli/inject.rb:23:in `block in run'
  /Users/bundler/lib/bundler/cli/inject.rb:21:in `each_slice'
  /Users/bundler/lib/bundler/cli/inject.rb:21:in `run'
  /Users/bundler/lib/bundler/cli.rb:468:in `inject'
  /Users/bundler/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
  /Users/bundler/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
  /Users/bundler/lib/bundler/vendor/thor/lib/thor.rb:359:in `dispatch'
  /Users/bundler/lib/bundler/cli.rb:21:in `dispatch'
  /Users/bundler/lib/bundler/vendor/thor/lib/thor/base.rb:440:in `start'
  /Users/bundler/lib/bundler/cli.rb:11:in `start'
  /Users/bundler/exe/bundle:32:in `block in <main>'
  /Usersbundler/lib/bundler/friendly_errors.rb:121:in `with_friendly_errors'
  /Users/bundler/exe/bundle:24:in `<main>'

Environment

Bundler   1.14.3
Rubygems  2.5.1
Ruby      2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin15]
GEM_HOME  /Users/.rvm/gems/ruby-2.3.1
GEM_PATH  /Users/.rvm/gems/ruby-2.3.1:/Users/.rvm/gems/ruby-2.3.1@global
RVM       1.28.0 (latest)
Git       2.10.1
Platform  x86_64-darwin-15
OpenSSL   OpenSSL 1.0.2j  26 Sep 2016
rubygems-bundler (1.4.4)

Bundler settings

gem.test
  Set for the current user (/Users/.bundle/config): "false"
gem.mit
  Set for the current user (/Users/.bundle/config): "true"
gem.coc
  Set for the current user (/Users/.bundle/config): "true"
trampoline_disable
  Set via BUNDLE_TRAMPOLINE_DISABLE: "1"

[Shekharrajak]

Also bundle inject 'pry' > '>0' shows(and does) nothing.

and

bundle inject 'pry'1234 '>0'
Fetching gem metadata from https://rubygems.org/.........
Fetching version metadata from https://rubygems.org/.
Could not find gem 'pry1234 (> 0)' in any of the gem sources listed in your Gemfile.

must show the bundle inject usage.

[Shekharrajak]

I am working on it and i'll open PR soon.