Help: Minor formatting and cross-ref cleanup for <CONFIG>_POSTFIX

Help/prop_tgt/CONFIG_POSTFIX.rst

@@ -1,13 +1,13 @@
 <CONFIG>_POSTFIX
 ----------------
 
-Postfix to append to the target file name for configuration <CONFIG>.
+Postfix to append to the target file name for configuration ``<CONFIG>``.
 
-When building with configuration <CONFIG> the value of this property
+When building with configuration ``<CONFIG>`` the value of this property
 is appended to the target file name built on disk.  For non-executable
-targets, this property is initialized by the value of the variable
-CMAKE_<CONFIG>_POSTFIX if it is set when a target is created.  This
-property is ignored on the Mac for Frameworks and App Bundles.
+targets, this property is initialized by the value of the
+:variable:`CMAKE_<CONFIG>_POSTFIX` variable if it is set when a target is
+created.  This property is ignored on macOS for Frameworks and App Bundles.
 
 For macOS see also the :prop_tgt:`FRAMEWORK_MULTI_CONFIG_POSTFIX_<CONFIG>`
 target property.