Improved readme phrasing

Author: Froussios

README.md

@@ -11,6 +11,7 @@ No experience with either reactive or functional programming is needed to follow
 The content of this book is meant to be read from start to finish. It begins with the basics and every subsequent chapter introduces increasingly advanced features and concepts. Sections of the book are intended to be self-containing and to-the-point, so that the book can be referred back to by non-beginners.
 
 The examples used in the book are also [available in complilable](/tests/java/itrx) java files in two formats:
-* Examples that print to standard output
-* Silent, self-proving examples in the form of [JUnit](http://junit.org/) tests.
+* Examples that print to standard output (recommended for first-time readers)
+* Silent, self-checking examples in the form of [JUnit](http://junit.org/) tests.
 The readers are invited to study whichever style suits them best.
+