Syntax in readme

Author: RichardLitt

readme.md

@@ -7,9 +7,9 @@ Parts of a DOI:
  * Registrant code: . + [0-9]{4,}
  * Registrant subdivision (optional): . + [0-9]+
  * Suffix: / + any character, case insensitive for ASCII chars (but capitalised
-	in the registry), with some characters that _should_ be escaped
-	Recommended encoding: ```"{}^[]`|\\&\/\'<>```
- 	Mandatory encoding: ```%"#? ```(and space)
+	in the registry), with some characters that _should_ be escaped  
+	Recommended encoding: ```"{}^[]`|\\&\/\'<>```  
+ 	Mandatory encoding: ```%"#?``` and space.
 
 From: http://www.doi.org/doi_handbook/2_Numbering.html#2.2