g.mapset: msg modified to be less mysterious when used in scripts

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@64892 15284696-431f-4ddb-bdfa-cd5b030d7da7

general/g.mapset/main.c

@@ -202,7 +202,7 @@ int main(int argc, char *argv[])
 
     G_free(mapset_old_path);
 
-    G_important_message(_("Your shell continues to use the history "
+    G_important_message(_("Mapset switched. Your shell continues to use the history "
 			  "for the old mapset"));
 
     if ((shell = getenv("SHELL"))) {