Ignore duplicate words "in in" and "is is" since that can be valid

sanityCheck

@@ -70,7 +70,7 @@ $GREP "<<set[^{>=]*==" -- 'src/*' | myprint "DoubleEqualsInSet"
 # Check for, e.g   <<if slaves[foo]>>
 $GREP "<<\([^>]\|[^>]>[^>]\)*[^$]slaves\[" -- 'src/*' | myprint "MissingDollar"
 # Check for duplicate words, e.g. with with
-$GREP -e  " \(\b[a-zA-Z][a-zA-Z]\+\) \1\b " --and --not -e "her her" --and --not -e "you you" --and --not -e "that that" -- 'src/*' | myprint "Duplicate words"
+$GREP -e  " \(\b[a-zA-Z][a-zA-Z]\+\) \1\b " --and --not -e " her her " --and --not -e " you you " --and --not -e " that that " --and --not -e " in in " --and --not -e " is is "-- 'src/*' | myprint "Duplicate words"
 
 # Check that we do not have any variables that we use only once.   e.g.     $onlyUsedOnce
 # Ignore  *Nationalities