[libc++][doc] Improve contributor documentation.
Addresses the post-commit review comments of D107596.
NOKEYCHECK=True
GitOrigin-RevId: d2bc4fa3c70ad9dd1723b2e75c9059c5db2052cf
diff --git a/include/format b/include/format
index cfd851a..20c2863 100644
--- a/include/format
+++ b/include/format
@@ -55,9 +55,9 @@
*/
-// Make sure all feature tests macros are always available.
+// Make sure all feature-test macros are available.
#include <version>
-// Only enable the contents of the header when libc++ was build with LIBCXX_ENABLE_INCOMPLETE_FEATURES enabled
+// Enable the contents of the header only when libc++ was built with LIBCXX_ENABLE_INCOMPLETE_FEATURES.
#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
#include <__config>
diff --git a/include/ranges b/include/ranges
index 1ca3ea5..49e7964 100644
--- a/include/ranges
+++ b/include/ranges
@@ -181,9 +181,9 @@
*/
-// Make sure all feature tests macros are always available.
+// Make sure all feature-test macros are available.
#include <version>
-// Only enable the contents of the header when libc++ was build with LIBCXX_ENABLE_INCOMPLETE_FEATURES enabled
+// Enable the contents of the header only when libc++ was built with LIBCXX_ENABLE_INCOMPLETE_FEATURES.
#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
#include <__config>