The ornamental design for a protectivecover for pruning saw, as shown and described.
FIG. 1 is a front, top perspective view of a protective cover for pruning saw showing my new design.
FIG. 2 is a front elevational view thereof.
FIG. 3 is a rear elevational view thereof.
FIG. 4 is a left end elevational view thereof.
FIG. 5 is a right end elevational view thereof.
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The length of the claimed design is shown broken away in the views to indicate indeterminate size, with the understanding that the indeterminate length portion not shown in the drawings forms no part of claimed design.