Banner indentation

[ivantsepp]

Simple fix for the indentation of the banner.

Before:

  Usage: spin serve
         spin push <file> <file>...
  Spin preloads your Rails environment to speed up your autotest(ish) workflow.

Server Options:
    -I, --load-path=DIR:DIR          Appends directory to $LOAD_PATH
        --rspec                      Force the selected test framework to RSpec
        --test-unit                  Force the selected test framework to Test::Unit
    -t, --time                       See total execution time for each test run
        --push-results               Push test results to the push process
        --preload FILE               Preload this file instead of config/application.rb
...

After:

Usage: spin serve
       spin push <file> <file>...
Spin preloads your Rails environment to speed up your autotest(ish) workflow.

Server Options:
    -I, --load-path=DIR:DIR          Appends directory to $LOAD_PATH
        --rspec                      Force the selected test framework to RSpec
        --test-unit                  Force the selected test framework to Test::Unit
    -t, --time                       See total execution time for each test run
        --push-results               Push test results to the push process
...