Update src/tools/miri/tests/pass/const-addrs.rs

Co-authored-by: Ralf Jung <post@ralfj.de>

Author: cjgillot

src/tools/miri/tests/pass/const-addrs.rs

@@ -1,7 +1,7 @@
 // The interpreter used to create a new AllocId every time it evaluates any const.
 // This caused unbounded memory use in Miri.
 // This test verifies that we only create a bounded amount of addresses for any given const.
-// In practice, the interpreter always returns the same address, but we *do not guarantee* it.
+// In practice, the interpreter always returns the same address, but we *do not guarantee* that.
 //@compile-flags: -Zinline-mir=no
 
 const EVALS: usize = 256;