Minor documentation formatting.

README.md

 # Short JSON Schema
 
 Short JSON Schema is an abbreviated syntax for a subset of [JSON Schema][jsonschema].  
-JSON Schema is a powerful language for constraining the format of JSON
-structures, but its standard, JSON-based syntax is very verbose.  
+
+JSON Schema is a powerful language for constraining the format of JSON structures, but its standard, JSON-based syntax is very verbose.  
 
 For to define a schema for this JSON format: