The ornamental design for a floor covering with dot pattern, as shown and described.
FIG. 1 is a plan view of a floor covering with dot pattern;
FIG. 2 is an enlarged detail view of area 2 circumscribed within FIG. 1;
FIG. 3 is an enlarged detail view of area 3 circumscribed within FIG. 2; and,
FIG. 4 is an enlarged detail view of area 4 circumscribed within FIG. 3.
The dot dash dot broken line perimeter around FIG. 1 depicts the boundaries of the claim and forms no part thereof. The dot dash dot broken lines within FIG. 1, around FIG. 2; within FIG. 2, around FIG. 3; and forming circles around detail areas in FIGS. 3 and 4 indicate the boundaries of the details, and form no part of the claimed design. All other dot dash dot broken lines in FIGS. 3 and 4 depict portions of the article that form no part of the claimed design.