Index: doc/Announce2.2.0
===================================================================
diff -u -r2a955681817e4db4776d7ae904babe8053c5ad74 -rb8d2494c5509fcfd7a8cc78ccf685f12b062c6bd
--- doc/Announce2.2.0	(.../Announce2.2.0)	(revision 2a955681817e4db4776d7ae904babe8053c5ad74)
+++ doc/Announce2.2.0	(.../Announce2.2.0)	(revision b8d2494c5509fcfd7a8cc78ccf685f12b062c6bd)
@@ -172,7 +172,10 @@
       dereferencing) and buffer overflows in string operations.
     + Silence warnings under MSVC 1914
 
-  * New configure option: "--enable-development=test"  *** what does this do exactly??? ****
+  * New configure option: "--enable-development=test"
+    Enable computational intensive runtime tests, having
+    noticeable effects on runtime. A version of NSF configured with
+    "--enable-development" can be used also for production environments.
 
   * Extended regression test suite:
     The test suite contains now 6243 tests (for Tcl 8.6.8). This