programs/xcopy: fix a typo in a comment

[Austin English]

-- 
-Austin
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diff --git a/programs/xcopy/xcopy.c b/programs/xcopy/xcopy.c
index e424eea..534eea1 100644
--- a/programs/xcopy/xcopy.c
+++ b/programs/xcopy/xcopy.c
@@ -779,7 +779,7 @@ static int XCOPY_ParseCommandLine(WCHAR *suppliedsource,
                           memset(&st, 0x00, sizeof(st));
 
                           /* Microsoft's xcopy's usage implies that the date
-                           * format depends on the locale but that false.
+                           * format depends on the locale but that is false.
                            * It is hardcoded to month-day-year
                            */
                           st.wMonth = _wtol(pos);