Cleanup README examples

Author: stevenharman

README.md

@@ -51,15 +51,15 @@ With the hook initialized in a repository, create branches being sure to include
 the Pivotal Tracker story number in the branch name.
 
 ```bash
-$ git checkout -b a_useful_and_helpful_name_8675309
+$ git switch -c best_feature_ever_8675309
 ```
 
 When you commit, Git will fire the hook which will find the story number in the
 branch name and prepare your commit message so that it includes the story number
 in the [special Pivotal Tracker syntax][pt-format].
 
 ```bash
-# on branch named `best_feature_ever-8675309`
+# on branch named `best_feature_ever_8675309`
 $ git commit
 ```
 
@@ -72,7 +72,7 @@ the top)*
 [#8675309]
 # Please enter the commit message for your changes. Lines starting
 # with '#' will be ignored, and an empty message aborts the commit.
-# On branch best_feature_ever-8675309
+# On branch best_feature_ever_8675309
 # Changes to be committed:
 #   (use "git reset HEAD <file>..." to unstage)
 #
@@ -89,7 +89,7 @@ If you pass a commit message on the command line the hook will still add the
 story number, preceded by an empty line, to the end of your message.
 
 ```bash
-# on branch named `best_feature_ever-8675309`
+# on branch named `best_feature_ever_8675309`
 $ git commit -m'Look at this rad code, yo!'
 ```
 
@@ -105,7 +105,7 @@ However, if you include the story number in the Pivotal Tracker format within
 your commit message, the hook will do nothing.
 
 ```bash
-# on branch named `best_feature_ever-8675309`
+# on branch named `best_feature_ever_8675309`
 $ git commit -m'[#8675309] Look at this rad code, yo!'
 ```
 
@@ -156,12 +156,11 @@ name, optionally prefixing it with a hash (`#`). Examples:
 ## Contributing :octocat:
 
 1. Fork it
-2. Create your feature branch (`git checkout -b my_new_feature`)
+2. Create your feature branch (`git switch -c my_new_feature`)
 3. Commit your changes (`git commit -am 'Added some feature'`)
 4. Push to the branch (`git push origin my_new_feature`)
 5. Create new Pull Request
 
-
 [pt]: https://www.pivotaltracker.com/
 [pt-format]: https://www.pivotaltracker.com/help/api?version=v3#scm_post_commit_message_syntax
 [tpope]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html