@@ -640,15 +640,15 @@ mod parser {
640640 . arg ( "--bytes" )
641641 . arg ( "1ZB" )
642642 . fails_with_code ( 2 )
643- . stderr_contains ( "cmp: invalid unit in '1ZB' for option --bytes" ) ;
643+ . stderr_contains ( "cmp: invalid unit in '1ZB' for option ' --bytes' " ) ;
644644
645645 new_ucmd ! ( )
646646 . arg ( "lorem_ipsum.txt" )
647647 . arg ( "lorem_ipsum_diff.txt" )
648648 . arg ( "--bytes" )
649649 . arg ( "99999999999999999999999999999999999999999999999999999999999" )
650650 . fails_with_code ( 2 )
651- . stderr_contains ( "cmp: invalid value '99999999999999999999999999999999999999999999999999999999999' (too large) for option --bytes" ) ;
651+ . stderr_contains ( "cmp: invalid value '99999999999999999999999999999999999999999999999999999999999' (too large) for option ' --bytes' " ) ;
652652 }
653653
654654 #[ test]
@@ -659,7 +659,7 @@ mod parser {
659659 . arg ( "lorem_ipsum_diff.txt" )
660660 . arg ( "--bytes=-1" )
661661 . fails_with_code ( 2 )
662- . stderr_contains ( "cmp: invalid value '-1' for option --bytes" ) ;
662+ . stderr_contains ( "cmp: invalid value '-1' for option ' --bytes' " ) ;
663663 }
664664
665665 #[ test]
@@ -671,15 +671,15 @@ mod parser {
671671 . arg ( "1" )
672672 . arg ( "2Y" )
673673 . fails_with_code ( 2 )
674- . stderr_contains ( "cmp: invalid unit in '2Y' for option --ignore-initial" ) ;
674+ . stderr_contains ( "cmp: invalid unit in '2Y' for option ' --ignore-initial' " ) ;
675675
676676 new_ucmd ! ( )
677677 . arg ( "lorem_ipsum.txt" )
678678 . arg ( "lorem_ipsum_diff.txt" )
679679 . arg ( "--ignore-initial" )
680680 . arg ( "99999999999999999999999999999999999999999999999999999999999" )
681681 . fails_with_code ( 2 )
682- . stderr_contains ( "cmp: invalid value '99999999999999999999999999999999999999999999999999999999999' (too large) for option --ignore-initial" ) ;
682+ . stderr_contains ( "cmp: invalid value '99999999999999999999999999999999999999999999999999999999999' (too large) for option ' --ignore-initial' " ) ;
683683 }
684684
685685 #[ test]
@@ -691,7 +691,7 @@ mod parser {
691691 . arg ( "--ignore-initial" )
692692 . arg ( "1:2:3" )
693693 . fails_with_code ( 2 )
694- . stderr_contains ( "cmp: invalid unit in '2:3' for option --ignore-initial" ) ;
694+ . stderr_contains ( "cmp: invalid unit in '2:3' for option ' --ignore-initial' " ) ;
695695 }
696696
697697 #[ test]
@@ -714,7 +714,7 @@ mod parser {
714714 . arg ( "lorem_ipsum.txt" )
715715 . arg ( "lorem_ipsum_diff.txt" )
716716 . fails_with_code ( 2 )
717- . stderr_contains ( "cmp: options --verbose and --silent are incompatible" ) ;
717+ . stderr_contains ( "cmp: options ' --verbose' and ' --silent' are incompatible" ) ;
718718 }
719719
720720 #[ test]
@@ -725,7 +725,7 @@ mod parser {
725725 . arg ( "lorem_ipsum.txt" )
726726 . arg ( "lorem_ipsum_diff.txt" )
727727 . fails_with_code ( 2 )
728- . stderr_contains ( "cmp: options --verbose and --silent are incompatible" ) ;
728+ . stderr_contains ( "cmp: options ' --verbose' and ' --silent' are incompatible" ) ;
729729 }
730730
731731 #[ test]
@@ -737,7 +737,7 @@ mod parser {
737737 . arg ( "lorem_ipsum.txt" )
738738 . arg ( "lorem_ipsum_diff.txt" )
739739 . fails_with_code ( 2 )
740- . stderr_contains ( "cmp: options --print-bytes and --silent are incompatible" ) ;
740+ . stderr_contains ( "cmp: options ' --print-bytes' and ' --silent' are incompatible" ) ;
741741 }
742742
743743 #[ test]
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