Changed format of test data for word selection test - each test's data in own directory

idea/testData/wordSelection/ValueParameters/0.kt

@@ -0,0 +1,2 @@
+fun foo(a : Array<String>, <selection><caret>b : Int</selection>) {
+}

idea/testData/wordSelection/ValueParameters/1.kt

@@ -0,0 +1,2 @@
+fun foo(<selection>a : Array<String>, <caret>b : Int</selection>) {
+}