Tweak Sequence.all() and Sequence.any().

When possible, they return the actual value from the predicate
instead of always just "true" and "false". This matches && and ||
which evaluate to the RHS or LHS when appropriate.

test/core/list/all.wren

@@ -1,9 +0,0 @@
-var a = [1, 2, 3]
-var b = a.all {|x| x > 1 }
-IO.print(b) // expect: false
-
-var d = a.all {|x| x > 0 }
-IO.print(d) // expect: true
-
-var e = [].all {|x| false }
-IO.print(e) // expect: true

test/core/list/all_non_bool_returning_fn.wren

@@ -1 +0,0 @@
-IO.print([1, 2, 3].all {|x| "truthy" }) // expect: true

test/core/list/any.wren

@@ -1,10 +0,0 @@
-var a = [1, 2, 3]
-
-var b = a.any {|x| x > 3 }
-IO.print(b) // expect: false
-
-var d = a.any {|x| x > 1 }
-IO.print(d) // expect: true
-
-var e = [].any {|x| true }
-IO.print(e) // expect: false

test/core/list/any_non_bool_returning_fn.wren

@@ -1 +0,0 @@
-IO.print([1, 2, 3].any {|x| "truthy" }) // expect: true

test/core/sequence/all.wren

@@ -0,0 +1,10 @@
+var a = [1, 2, 3]
+IO.print(a.all {|x| x > 1 }) // expect: false
+IO.print(a.all {|x| x > 0 }) // expect: true
+IO.print([].all {|x| false }) // expect: true
+
+// Returns first falsey value.
+IO.print(a.all {|x| x < 2 ? null : false }) // expect: null
+
+// Returns last truthy value.
+IO.print(a.all {|x| x }) // expect: 3

test/core/sequence/any.wren

@@ -0,0 +1,10 @@
+var a = [1, 2, 3]
+IO.print(a.any {|x| x > 3 }) // expect: false
+IO.print(a.any {|x| x > 1 }) // expect: true
+IO.print([].any {|x| true }) // expect: false
+
+// Returns first truthy value.
+IO.print(a.any {|x| x }) // expect: 1
+
+// Returns last falsey value.
+IO.print(a.any {|x| x < 2 ? null : false }) // expect: false