Cleaning up asserts and file/line macros.

src/alloy/arena.cc

@@ -45,7 +45,7 @@ void* Arena::Alloc(size_t size) {
     if (active_chunk_->capacity - active_chunk_->offset < size + 4096) {
       Chunk* next = active_chunk_->next;
       if (!next) {
-        XEASSERT(size < chunk_size_);  // need to support larger chunks
+        assert_true(size < chunk_size_, "need to support larger chunks");
         next = new Chunk(chunk_size_);
         active_chunk_->next = next;
       }