Translate a code comment

toku-sa-n · toku-sa-n · commit 6940d9c9ea00 · 2020-07-15T00:31:47.000+09:00
diff --git a/src/phantom-data.md b/src/phantom-data.md
@@ -132,7 +132,7 @@ that:
 use std::marker;
 
 struct Vec<T> {
-    data: *const T, // *const for covariance!
+    data: *const T, // 変性を得るため *const です!
     len: usize,
     cap: usize,
     _marker: marker::PhantomData<T>,
