typo: Double word "is" (dotnet/corefx#36283)

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>

diff --git a/src/System.Private.CoreLib/shared/System/Globalization/DateTimeParse.cs b/src/System.Private.CoreLib/shared/System/Globalization/DateTimeParse.cs
index bc0193d..99cc413 100644 (file)
--- a/src/System.Private.CoreLib/shared/System/Globalization/DateTimeParse.cs
+++ b/src/System.Private.CoreLib/shared/System/Globalization/DateTimeParse.cs
@@ -3690,7 +3690,7 @@ new DS[] { DS.ERROR, DS.TX_NNN,  DS.TX_NNN,  DS.TX_NNN,  DS.ERROR,   DS.ERROR,
                 // DateTimeOffset.Parse should allow dates without a year, but only if there is also no time zone marker;
                 // e.g. "May 1 5pm" is OK, but "May 1 5pm -08:30" is not.  This is somewhat pragmatic, since we would
                 // have to rearchitect parsing completely to allow this one case to correctly handle things like leap
-                // years and leap months.  Is is an extremely corner case, and DateTime is basically incorrect in that
+                // years and leap months.  Is an extremely corner case, and DateTime is basically incorrect in that
                 // case today.
                 //
                 // values like "11:00Z" or "11:00 -3:00" are also acceptable