Merge pull request #1384 from tsvankay/float_repr

Fix __repr__ return value for -0.0

tests/snippets/floats.py

@@ -198,6 +198,7 @@ assert_raises(ValueError, float('nan').as_integer_ratio)
 
 assert str(1.0) == '1.0'
 assert str(0.0) == '0.0'
+assert str(-0.0) == '-0.0'
 assert str(1.123456789) == '1.123456789'
 
 # Test special case for lexer, float starts with a dot:

vm/src/obj/objfloat.rs

@@ -411,7 +411,7 @@ impl PyFloat {
     #[pymethod(name = "__repr__")]
     fn repr(&self, vm: &VirtualMachine) -> String {
         if self.is_integer(vm) {
-            format!("{:.1}", self.value)
+            format!("{:.1?}", self.value)
         } else {
             self.value.to_string()
         }