README.md in trackler-2.2.1.100

- old
+ new

@@ -7,11 +7,11 @@
 alphabet is backwards. The first letter is replaced with the last
 letter, the second with the second-last, and so on.
 
 An Atbash cipher for the Latin alphabet would be as follows:
 
-```plain
+```text
 Plain:  abcdefghijklmnopqrstuvwxyz
 Cipher: zyxwvutsrqponmlkjihgfedcba
 ```
 
 It is a very weak cipher because it only has one possible key, and it is
@@ -21,10 +21,11 @@
 Ciphertext is written out in groups of fixed length, the traditional group size
 being 5 letters, and punctuation is excluded. This is to make it harder to guess
 things based on word boundaries.
 
 ## Examples
+
 - Encoding `test` gives `gvhg`
 - Decoding `gvhg` gives `test`
 - Decoding `gsvjf rxpyi ldmul cqfnk hlevi gsvoz abwlt` gives `thequickbrownfoxjumpsoverthelazydog`
 
 * * * *
@@ -39,18 +40,16 @@
 
 If you would like color output, you can `require 'minitest/pride'` in
 the test file, or note the alternative instruction, below, for running
 the test file.
 
-In order to run the test, you can run the test file from the exercise
-directory. For example, if the test suite is called
-`hello_world_test.rb`, you can run the following command:
+Run the tests from the exercise directory using the following command:
 
-    ruby hello_world_test.rb
+    ruby atbash_cipher_test.rb
 
 To include color from the command line:
 
-    ruby -r minitest/pride hello_world_test.rb
+    ruby -r minitest/pride atbash_cipher_test.rb
 
 
 ## Source
 
 Wikipedia [http://en.wikipedia.org/wiki/Atbash](http://en.wikipedia.org/wiki/Atbash)