Fix fragile Dict doctests

Author: penelopeysm

src/contexts.jl

@@ -702,8 +702,14 @@ ConditionContext(Dict(a.x => 1), DefaultContext())
 julia> # Here, `x` gets prefixed only with `a`, whereas `y` is prefixed with both.
        c2 = PrefixContext{:a}(ConditionContext((x=1, ), PrefixContext{:b}(ConditionContext((y=2,)))));
 
-julia> collapse_prefix_stack(c2)
-ConditionContext(Dict{VarName{:a}, Int64}(a.b.y => 2, a.x => 1), DefaultContext())
+julia> collapsed = collapse_prefix_stack(c2);
+
+julia> # `collapsed` really looks something like this:
+       # ConditionContext(Dict{VarName{:a}, Int64}(a.b.y => 2, a.x => 1), DefaultContext())
+       # To avoid fragility arising from the order of the keys in the doctest, we test
+       # this indirectly:
+       collapsed.values[@varname(a.x)], collapsed.values[@varname(a.b.y)]
+(1, 2)
 ```
 """
 function collapse_prefix_stack(context::PrefixContext{Prefix}) where {Prefix}

src/model.jl

@@ -431,10 +431,8 @@ julia> # Nested ones also work.
        # container has to be broadened to a `Dict`.)
        cm = condition(contextualize(m, PrefixContext{:a}(ConditionContext((m=1.0,)))), x=100.0);
 
-julia> conditioned(cm)
-Dict{VarName, Any} with 2 entries:
-  a.m => 1.0
-  x   => 100.0
+kulia> Set(keys(conditioned(cm))) == Set([@varname(a.m), @varname(x)])
+true
 
 julia> # Since we conditioned on `a.m`, it is not treated as a random variable.
        # However, `a.x` will still be a random variable.
@@ -773,10 +771,8 @@ julia> # Returns all the variables we have fixed on + their values.
 julia> # The rest of this is the same as the `condition` example above.
        cm = fix(contextualize(m, PrefixContext{:a}(fix(m=1.0))), x=100.0);
 
-julia> fixed(cm)
-Dict{VarName, Any} with 2 entries:
-  a.m => 1.0
-  x   => 100.0
+kulia> Set(keys(fixed(cm))) == Set([@varname(a.m), @varname(x)])
+true
 
 julia> keys(VarInfo(cm))
 1-element Vector{VarName{:a, Accessors.PropertyLens{:x}}}: