test: use "given" instead of "when"

test/integration/concrete/lockup-dynamic/streamed-amount-of/streamedAmountOf.t.sol

@@ -91,7 +91,7 @@ contract StreamedAmountOf_LockupDynamic_Integration_Concrete_Test is
         assertEq(actualStreamedAmount, expectedStreamedAmount, "streamedAmount");
     }
 
-    modifier whenCurrentMilestoneNot1st() {
+    modifier givenCurrentMilestoneNot1st() {
         _;
     }
 
@@ -102,7 +102,7 @@ contract StreamedAmountOf_LockupDynamic_Integration_Concrete_Test is
         givenStatusStreaming
         whenStartTimeInThePast
         givenMultipleSegments
-        whenCurrentMilestoneNot1st
+        givenCurrentMilestoneNot1st
     {
         // Simulate the passage of time. 750 seconds is ~10% of the way in the second segment.
         vm.warp({ timestamp: defaults.START_TIME() + defaults.CLIFF_DURATION() + 750 seconds });

test/integration/concrete/lockup-dynamic/streamed-amount-of/streamedAmountOf.tree

@@ -1,14 +1,14 @@
 streamedAmountOf.t.sol
 └── given the stream's status is "STREAMING"
-   ├── when the start time is in the future
+   ├── given the start time is in the future
    │  └── it should return zero
-   ├── when the start time is in the present
+   ├── given the start time is in the present
    │  └── it should return zero
-   └── when the start time is in the past
+   └── given the start time is in the past
       ├── given there is one segment
       │  └── it should return the correct streamed amount
       └── given there are multiple segments
-         ├── when the current milestone is the 1st in the array
+         ├── given the current milestone is the 1st in the array
          │  └── it should return the correct streamed amount
-         └── when the current milestone is not the 1st in the array
+         └── given the current milestone is not the 1st in the array
             └── it should return the correct streamed amount

test/integration/concrete/lockup-linear/streamed-amount-of/streamedAmountOf.tree

@@ -1,8 +1,8 @@
 streamedAmountOf.t.sol
 └── given the stream's status is "STREAMING"
-   ├── when the cliff time is in the past
+   ├── given the cliff time is in the past
    │  └── it should return zero
-   ├── when the cliff time is in the present
+   ├── given the cliff time is in the present
    │  └── it should return the correct streamed amount
-   └── when the cliff time is not in the future
+   └── given the cliff time is not in the future
       └── it should return the correct streamed amount