[devel] Revised manual paragraph about use of 'NO' macros.
diff --git a/libpng-manual.txt b/libpng-manual.txt
index a1a6db7..6a7ac86 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -4214,10 +4214,10 @@
/*#undef PNG_feature_SUPPORTED*/
if it is not. Library code consistently checks for the 'SUPPORTED' macro.
-It does not, and should not, check for the 'NO' macro which will not
-normally be defined even if the feature is not supported. The 'NO' macros
-are only used internally for setting the corresponding 'SUPPORTED' macros
-or not.
+It does not, and libpng applications should not, check for the 'NO' macro
+which will not normally be defined even if the feature is not supported.
+The 'NO' macros are only used internally for setting or not setting the
+corresponding 'SUPPORTED' macros.
Compatibility with the old names is provided as follows:
diff --git a/libpng.3 b/libpng.3
index eb2b514..2a88cb5 100644
--- a/libpng.3
+++ b/libpng.3
@@ -5169,10 +5169,10 @@
/*#undef PNG_feature_SUPPORTED*/
if it is not. Library code consistently checks for the 'SUPPORTED' macro.
-It does not, and should not, check for the 'NO' macro which will not
-normally be defined even if the feature is not supported. The 'NO' macros
-are only used internally for setting the corresponding 'SUPPORTED' macros
-or not.
+It does not, and libpng applications should not, check for the 'NO' macro
+which will not normally be defined even if the feature is not supported.
+The 'NO' macros are only used internally for setting or not setting the
+corresponding 'SUPPORTED' macros.
Compatibility with the old names is provided as follows:
