dep: improve docstrings for Cpv and Dep intersects()

Author: radhermit

src/pkgcraft/dep/cpv.pyx

@@ -286,7 +286,7 @@ cdef class Cpv:
         return C.pkgcraft_cpv_restrict_matches(self.ptr, r.ptr)
 
     def intersects(self, other):
-        """Determine intersection between two Cpv or Dep objects.
+        """Determine if a Cpv intersects with another object.
 
         Args:
             other: object to check for intersection against

src/pkgcraft/dep/pkg.pyx

@@ -638,7 +638,7 @@ cdef class Dep:
         return C.pkgcraft_dep_restrict_matches(self.ptr, r.ptr)
 
     def intersects(self, other):
-        """Determine intersection between two Cpv or Dep objects.
+        """Determine if a Dep intersects with another object.
 
         Args:
             other: object to check for intersection against