Merge branch 'develop' into delayed_assignment

Author: bowbahdoe

src/objects/challenges.md

@@ -34,7 +34,7 @@ class Broom {
 class Witch {
     Object pullFromHat() {
         double r = Math.random();
-        if (Math.random() < 0.25) {
+        if (r < 0.25) {
             return new Spell("Ensmallen");
         }
         else if (r < 0.5) {

src/time/instant.md

@@ -13,7 +13,7 @@ void main() {
 }
 ```
 
-But if you happen to know a number milliseconds after January 1, 1970 UTC[^epoch] you
+But if you happen to know the number of milliseconds since January 1, 1970 0:00 UTC[^epoch], you
 can get an `Instant` which represents that point in time with `Instant.ofEpochMilli`.
 
 ```java