Reword "foreach" loop in "Refactoring to functional style" series introduction

[danthe1st]

@venkats contributes the Refactoring from the Imperative to the Functional Style series to dev.java.

In the series introduction/index page, there is a table containing all tutorials as well as how these are transformed.
The Imperative Style column of that table contains cells like foreach(...) { if... } even though Java uses the syntax for(TypeName variableName : someIterable).

I suggest changing this in order to not make it look like Java has a foreach keyword.