Merge pull request #380 from FrankHB/patch-3

[expr.new] Avoid "heap allocation"

Author: zygoloid

source/expressions.tex

@@ -3024,7 +3024,7 @@
 \enterexample
 \begin{codeblock}
   void mergeable(int x) {
-    // These heap allocations are safe for merging:
+    // These allocations are safe for merging:
     std::unique_ptr<char[]> a{new (std::nothrow) char[8]};
     std::unique_ptr<char[]> b{new (std::nothrow) char[8]};
     std::unique_ptr<char[]> c{new (std::nothrow) char[x]};