diff --git a/src/rsprocess/bisimilarity/test_paige_tarjan.rs b/src/rsprocess/bisimilarity/test_paige_tarjan.rs
index 6d11437..905cc6c 100644
--- a/src/rsprocess/bisimilarity/test_paige_tarjan.rs
+++ b/src/rsprocess/bisimilarity/test_paige_tarjan.rs
@@ -1,4 +1,5 @@
-use super::bisimilarity_paige_tarkan::{bisimilarity, bisimilarity_ignore_labels};
+use super::bisimilarity_paige_tarkan::{bisimilarity,
+				       bisimilarity_ignore_labels};
 
 #[test]
 fn identity_paige_tarjan() {
diff --git a/src/rsprocess/rsdot.rs b/src/rsprocess/dot.rs
similarity index 97%
rename from src/rsprocess/rsdot.rs
rename to src/rsprocess/dot.rs
index d7ecd82..1f30625 100644
--- a/src/rsprocess/rsdot.rs
+++ b/src/rsprocess/dot.rs
@@ -16,7 +16,7 @@ use petgraph::
 	NodeRef,
 }};
 
-pub struct RSDot<'a, G>
+pub struct Dot<'a, G>
 where
     G: IntoEdgeReferences + IntoNodeReferences + DataMap,
 {
@@ -30,14 +30,14 @@ static TYPE: [&str; 2] = ["graph", "digraph"];
 static EDGE: [&str; 2] = ["--", "->"];
 static INDENT: &str = "    ";
 
-impl<'a, G> RSDot<'a, G>
+impl<'a, G> Dot<'a, G>
 where
     G: IntoNodeReferences + IntoEdgeReferences + DataMap,
 {
     /// Create a `Dot` formatting wrapper with default configuration.
     #[inline]
     pub fn new(graph: G) -> Self {
-	RSDot {
+	Dot {
 	    graph,
 	    get_edge_attributes: &|_, _| String::new(),
 	    get_node_attributes: &|_, _| String::new(),
@@ -49,7 +49,7 @@ where
     #[inline]
     pub fn with_config(graph: G, config: &'a [Config]) -> Self {
 	let config = Configs::extract(config);
-	RSDot {
+	Dot {
 	    graph,
 	    get_edge_attributes: &|_, _| String::new(),
 	    get_node_attributes: &|_, _| String::new(),
@@ -65,7 +65,7 @@ where
 	get_node_attributes: &'a dyn Fn(G, G::NodeRef) -> String,
     ) -> Self {
 	let config = Configs::extract(config);
-	RSDot {
+	Dot {
 	    graph,
 	    get_edge_attributes,
 	    get_node_attributes,
@@ -167,7 +167,7 @@ macro_rules! make_config_struct {
 
 make_config_struct!();
 
-impl<G> RSDot<'_, G>
+impl<G> Dot<'_, G>
 where
     G: IntoNodeReferences + IntoEdgeReferences + NodeIndexable + GraphProp + DataMap,
 {
@@ -254,7 +254,7 @@ where
     }
 }
 
-impl<G> fmt::Display for RSDot<'_, G>
+impl<G> fmt::Display for Dot<'_, G>
 where
     G: IntoEdgeReferences + IntoNodeReferences + NodeIndexable + GraphProp + DataMap,
     G::EdgeWeight: fmt::Display,
@@ -265,7 +265,7 @@ where
     }
 }
 
-impl<G> fmt::LowerHex for RSDot<'_, G>
+impl<G> fmt::LowerHex for Dot<'_, G>
 where
     G: IntoEdgeReferences + IntoNodeReferences + NodeIndexable + GraphProp + DataMap,
     G::EdgeWeight: fmt::LowerHex,
@@ -276,7 +276,7 @@ where
     }
 }
 
-impl<G> fmt::UpperHex for RSDot<'_, G>
+impl<G> fmt::UpperHex for Dot<'_, G>
 where
     G: IntoEdgeReferences + IntoNodeReferences + NodeIndexable + GraphProp + DataMap,
     G::EdgeWeight: fmt::UpperHex,
@@ -287,7 +287,7 @@ where
     }
 }
 
-impl<G> fmt::Debug for RSDot<'_, G>
+impl<G> fmt::Debug for Dot<'_, G>
 where
     G: IntoEdgeReferences + IntoNodeReferences + NodeIndexable + GraphProp + DataMap,
     G::EdgeWeight: fmt::Debug,
diff --git a/src/rsprocess/graph.rs b/src/rsprocess/graph.rs
index 932d317..a30fa1e 100644
--- a/src/rsprocess/graph.rs
+++ b/src/rsprocess/graph.rs
@@ -1,5 +1,6 @@
 //! Definitions for generating graphs from a simulation.
 
+use petgraph::visit::{IntoEdgeReferences, IntoNodeReferences};
 use petgraph::{Graph, Directed};
 use std::rc::Rc;
 
@@ -437,8 +438,6 @@ impl EdgeDisplay {
 
 
 // Node ------------------------------------------------------------------------
-use petgraph::visit::{IntoEdgeReferences, IntoNodeReferences};
-
 type RSdotGraph = Graph<String, String, Directed, u32>;
 type RSformatNodeTy<'a> =
     dyn Fn(
diff --git a/src/rsprocess/mod.rs b/src/rsprocess/mod.rs
index 0b6f1dd..87919f2 100644
--- a/src/rsprocess/mod.rs
+++ b/src/rsprocess/mod.rs
@@ -16,7 +16,7 @@ pub mod bisimilarity;
 pub mod frequency;
 pub mod graph;
 pub mod presets;
-pub mod rsdot;
+pub mod dot;
 pub mod serialize;
 pub mod transitions;
 
diff --git a/src/rsprocess/presets.rs b/src/rsprocess/presets.rs
index 0f3d978..c49876f 100644
--- a/src/rsprocess/presets.rs
+++ b/src/rsprocess/presets.rs
@@ -12,7 +12,6 @@ use std::rc::Rc;
 use super::*;
 use super::graph::MapEdges;
 use super::set::Set;
-use super::system;
 use super::translator::Translator;
 
 use super::super::grammar;
@@ -626,7 +625,7 @@ pub fn dot(
 	    let edge_formatter =
 		edge_color.generate(Rc::clone(&graph));
 
-            let dot = rsdot::RSDot::with_attr_getters(
+            let dot = dot::Dot::with_attr_getters(
                 &modified_graph,
                 &[],
 		&edge_formatter,
diff --git a/src/rsprocess/translator.rs b/src/rsprocess/translator.rs
index 9c75390..738712a 100644
--- a/src/rsprocess/translator.rs
+++ b/src/rsprocess/translator.rs
@@ -20,22 +20,22 @@ pub struct Translator {
 
 impl Translator {
     pub fn new() -> Self {
-        Translator {
-            strings: HashMap::from([("*".into(), 0)]),
-            reverse: HashMap::from([(0, "*".into())]),
-            last_id: 1,
-        }
+	Translator {
+	    strings: HashMap::from([("*".into(), 0)]),
+	    reverse: HashMap::from([(0, "*".into())]),
+	    last_id: 1,
+	}
     }
 
     /// converts a string into an id
     pub fn encode(&mut self, s: impl Into<String>) -> IdType {
-        let s = s.into();
-        let id = *(self.strings.entry(s.clone()).or_insert({
-            self.last_id += 1;
-            self.last_id
-        }));
-        self.reverse.insert(id, s.clone());
-        id
+	let s = s.into();
+	let id = *(self.strings.entry(s.clone()).or_insert({
+	    self.last_id += 1;
+	    self.last_id
+	}));
+	self.reverse.insert(id, s.clone());
+	id
     }
 
     pub fn encode_not_mut(&self, s: impl Into<String>) -> Option<IdType> {
@@ -44,15 +44,15 @@ impl Translator {
 
     /// converts an id into the corresponding string
     pub fn decode(&self, el: IdType) -> Option<String> {
-        self.reverse
-            .get(&el)
-            .map(|x| x.to_string())
+	self.reverse
+	    .get(&el)
+	    .map(|x| x.to_string())
     }
 }
 
 impl Default for Translator {
     fn default() -> Self {
-        Translator::new()
+	Translator::new()
     }
 }
 
@@ -101,5 +101,3 @@ impl<'a, T> Formatter<'a, T> {
 	Self { data, translator }
     }
 }
-
-