diff --git a/Project.toml b/Project.toml
index eabf91f..6755835 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "MetaGraphsNext"
 uuid = "fa8bd995-216d-47f1-8a91-f3b68fbeb377"
-version = "0.5.0"
+version = "0.6.0-DEV"
 
 [deps]
 Graphs = "86223c79-3864-5bf0-83f7-82e725a168b6"
diff --git a/src/MetaGraphsNext.jl b/src/MetaGraphsNext.jl
index a23271b..a0998e7 100644
--- a/src/MetaGraphsNext.jl
+++ b/src/MetaGraphsNext.jl
@@ -1,7 +1,7 @@
 """
     MetaGraphsNext
 
-A package for graphs with vertex labels and metadata in Julia. Its main export is the [`MetaGraph`](@ref) type.
+A package for graphs with vertex labels and metadata in Julia. Its main export is the `MetaGraph` type.
 """
 module MetaGraphsNext
 
diff --git a/src/persistence.jl b/src/persistence.jl
index 7bb6bd3..cf7fd8e 100644
--- a/src/persistence.jl
+++ b/src/persistence.jl
@@ -70,18 +70,24 @@ function savedot(io::IO, meta_graph::MetaGraph)
 
     for label in keys(meta_graph.vertex_properties)
         write(io, "    ")
+        write(io, '"')
         write(io, label)
+        write(io, '"')
         show_meta_list(io, meta_graph[label])
         write(io, '\n')
     end
 
     for (label_1, label_2) in keys(edge_data)
         write(io, "    ")
+        write(io, '"')
         write(io, label_1)
+        write(io, '"')
         write(io, ' ')
         write(io, dash)
         write(io, ' ')
+        write(io, '"')
         write(io, label_2)
+        write(io, '"')
         show_meta_list(io, edge_data[arrange(meta_graph, label_1, label_2)])
         write(io, "\n")
     end
diff --git a/test/tutorial/3_files.jl b/test/tutorial/3_files.jl
index f5372d5..f4442f7 100644
--- a/test/tutorial/3_files.jl
+++ b/test/tutorial/3_files.jl
@@ -34,8 +34,16 @@ simple_str = mktemp() do file, io
     read(file, String)
 end
 
-print(simple_str)  #md
-@test simple_str == "graph T {\n    a\n    b\n    a -- b\n}\n"  #src
+simple_str_true = """
+graph T {
+    "a"
+    "b"
+    "a" -- "b"
+}
+"""
+
+simple_str == simple_str_true
+@test simple_str == simple_str_true  #src
 
 #-
 
@@ -58,6 +66,44 @@ complicated_str = mktemp() do file, io
     read(file, String)
 end
 
-print(complicated_str)  #md
-@test complicated_str ==  #src
-    "digraph G {\n    tagged = true\n    a [code_1 = 1, code_2 = 2]\n    b [code = 2]\n    a -> b [code = 12]\n}\n"  #src
+complicated_str_true = """
+digraph G {
+    tagged = true
+    "a" [code_1 = 1, code_2 = 2]
+    "b" [code = 2]
+    "a" -> "b" [code = 12]
+}
+"""
+
+@test complicated_str == complicated_str_true  #src
+
+#-
+
+with_spaces = MetaGraph(
+    DiGraph();
+    label_type=String,
+    vertex_data_type=Dict{Symbol,String},
+    edge_data_type=Dict{Symbol,String},
+)
+
+with_spaces["a b"] = Dict(:label => "A B")
+
+with_spaces["c d"] = Dict(:label => "C D")
+
+with_spaces["a b", "c d"] = Dict(:label => "A B to C D")
+
+with_spaces_str = mktemp() do file, io
+    savegraph(file, with_spaces, DOTFormat())
+    read(file, String)
+end
+
+with_spaces_str_true = """
+digraph G {
+    "a b" [label = "A B"]
+    "c d" [label = "C D"]
+    "a b" -> "c d" [label = "A B to C D"]
+}
+"""
+
+with_spaces_str == with_spaces_str_true
+@test with_spaces_str == with_spaces_str_true  #src