Use -langversion:experimental instead of -langversion:future in tests.

Alex Rønne Petersen · Alex Rønne Petersen · commit 61e0e3bef24c · 2015-05-11T09:37:54.000+02:00
diff --git a/Makefile b/Makefile
@@ -59,7 +59,7 @@ MCS_FLAGS += -langversion:experimental -unsafe -warnaserror
 XBUILD_FLAGS += /verbosity:quiet /property:Configuration=$(xb_mode)
 
 FSHARPC_TEST_FLAGS += --debug+ --nologo --warnaserror
-MCS_TEST_FLAGS += -debug -langversion:future -unsafe -warnaserror
+MCS_TEST_FLAGS += -debug -langversion:experimental -unsafe -warnaserror
 
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