fix some file extensions

Task/Boolean-values/CoffeeScript/boolean-values.coffee

@@ -0,0 +1,28 @@
+h1 = {foo: "bar"}
+h2 = {foo: "bar"}
+
+true_expressions = [
+  true
+  1
+  h1? # because h1 is defined above
+  not false
+  !false
+  []
+  {}
+  1 + 1 == 2
+  1 == 1 # simple value equality
+  true or false
+]
+
+false_expressions = [
+  false
+  not true
+  undeclared_variable?
+  0
+  ''
+  null
+  undefined
+  h1 == h2 # despite having same key/values
+  1 == "1" # different types
+  false and true
+]