remove -- from toolset

[SVN r51944]

tools/regression/src/library_test.bat

@@ -2,7 +2,7 @@
 if not "%1" == "" goto bjam
     echo Usage: %0 "<bjam arguments>"
     echo where typical bjam arguements are:
-    echo   --toolset=msvc-7.1,gcc
+    echo   toolset=msvc-7.1,gcc
     echo   variant=debug,release,profile
     echo   link=static,shared
     echo   threading=single,multi

tools/regression/src/library_test.sh

@@ -2,7 +2,7 @@ if test $# -eq 0
 then
     echo "Usage: $0 <bjam arguments>"
     echo "Typical bjam arguements are:"
-    echo "  --toolset=msvc-7.1,gcc"
+    echo "  toolset=msvc-7.1,gcc"
     echo "  variant=debug,release,profile"
     echo "  link=static,shared"
     echo "  threading=single,multi"

tools/regression/src/library_test_all.sh

@@ -2,7 +2,7 @@ if test $# -eq 0
 then
     echo "Usage: $0 <bjam arguments>"
     echo "Typical bjam arguments are:"
-    echo "  --toolset=msvc-7.1,gcc"
+    echo "  toolset=msvc-7.1,gcc"
     echo "  variant=debug,release,profile"
     echo "  link=static,shared"
     echo "  threading=single,multi"