Change float_cmp Applicability to HasPlaceholders

The suggestion includes an 'errors' placeholder currently, so it's not
`MachineApplicable`

Author: phansch

clippy_lints/src/misc.rs

@@ -401,7 +401,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MiscLints {
                                 lhs - rhs,
                                 if op == BinOpKind::Eq { '<' } else { '>' }
                             ),
-                            Applicability::MachineApplicable, // snippet
+                            Applicability::HasPlaceholders, // snippet
                         );
                         db.span_note(expr.span, "std::f32::EPSILON and std::f64::EPSILON are available.");
                     });