Fix prefix 2 typo (#4857)

* DOC: Fixed Typo in Preface

* DOC: Updated changes and release to reflect fix for typo

Author: Prabhu-LANL

CHANGES.txt

@@ -45,6 +45,9 @@ RELEASE  VERSION/DATE TO BE FILLED IN LATER
     - Fix Appveyor scripting to install unavailable python versions when needed and use them
       for testing.
 
+  From Prabhu S. Khalsa:
+    - Fix typo in preface
+
   From Mats Wichmann:
     - Introduce some unit tests for the file locking utility routines
     - Reduce unneeded computation of overrides. The Mkdir builder used an

RELEASE.txt

@@ -137,6 +137,8 @@ DOCUMENTATION
 
 - Update documentation for IMPLICIT_COMMAND_DEPENDENCIES construction variable.
 
+- Fix typo in preface
+
 DEVELOPMENT
 -----------
 

doc/user/preface.xml

@@ -230,8 +230,8 @@ This file is processed by the bin/SConsDoc.py module.
     It may also be useful to keep the &SCons; man page open in a separate
     browser tab or window to refer to as a complement to this Guide,
     which can avoid some jumping back and forth.
-    The four important manpage sections describiing the
-    of &consvars;, builders, tools and environment methods
+    The four important manpage sections describing the
+    &consvars;, builders, tools and environment methods
     are actually duplicated as appendices in the User Guide,
     to avoid inter-document links.