wingrass cosmetics in comment

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@63681 15284696-431f-4ddb-bdfa-cd5b030d7da7

mswindows/env.bat

@@ -1,6 +1,6 @@
 REM
 REM Environmental variables for GRASS stand-alone installer
-rem
+REM
 
 REM Default prompt: cmd.exe
 REM To enable bash prompt please uncomment the line bellow