diff --git a/README.md b/README.md
index b2d02f7..6aadb00 100644
--- a/README.md
+++ b/README.md
@@ -324,10 +324,11 @@ right now.
 * `fallback_icon` is a path to some PNG/SVG icon which will be used as
   `{app_icon}` if no application-specific icon can be determined.
 
-The placeholders `{app_name}`, `{name}`, `{output_name}`, and `{workspace_name}`
-allow to specify the maximum string length using format `{<name>:<len>}` (e.g.
-`{app_name:10}`).  If the string is longer than the specified length, it will
-be truncated and an ellipsis ("…") will be inserted at the end.
+The placeholders `{app_name}`, `{name}`, `{output_name}`, and
+`{workspace_name}` allow to specify the maximum string length using format
+`{<name>:<len>}` (e.g.  `{app_name:10}`).  If the string is longer than the
+specified length, it will be truncated and an ellipsis ("…") will be inserted
+at the end.
 
 It is crucial that during selection (using wofi or some other menu program)
 each window has a different display string.  Therefore, it is highly
diff --git a/src/tree.rs b/src/tree.rs
index 418ba0a..ea02070 100644
--- a/src/tree.rs
+++ b/src/tree.rs
@@ -518,33 +518,38 @@ impl DisplayFormat for DisplayNode<'_> {
                     .unwrap_or_else(String::new)
                     .as_str(),
             );
-        PLACEHOLDER_RX.replace_all(&fmt, |caps: &regex::Captures| {
-            let value = match &caps["name"] {
-                "app_name" => self.node.get_app_name(),
-                "name" | "title" => self.node.get_name(),
-                "output_name" => {
-                    self.tree
+
+        PLACEHOLDER_RX
+            .replace_all(&fmt, |caps: &regex::Captures| {
+                let value = match &caps["name"] {
+                    "app_name" => self.node.get_app_name(),
+                    "name" | "title" => self.node.get_name(),
+                    "output_name" => self
+                        .tree
                         .get_parent_node_of_type(self.node.id, Type::Output)
-                        .map_or("<no_output>", |w| w.get_name())
-                },
-                "workspace_name" => {
-                    self.tree
+                        .map_or("<no_output>", |w| w.get_name()),
+                    "workspace_name" => self
+                        .tree
                         .get_parent_node_of_type(self.node.id, Type::Workspace)
-                        .map_or("<no_workspace>", |w| w.get_name())
-                },
-                _ => &caps[0],
-            };
-            let width = caps.name("width")
-                .map_or("0", |m| m.as_str())
-                .parse::<usize>()
-                .unwrap();
-
-            if width > 0 && value.len() > width {
-                maybe_html_escape(html_escape, &format!("{}…", &value[..width - 1]))
-            } else {
-                maybe_html_escape(html_escape, &value)
-            }
-        }).into()
+                        .map_or("<no_workspace>", |w| w.get_name()),
+                    _ => &caps[0],
+                };
+                let width = caps
+                    .name("width")
+                    .map_or("0", |m| m.as_str())
+                    .parse::<usize>()
+                    .unwrap();
+
+                if width > 0 && value.len() > width {
+                    maybe_html_escape(
+                        html_escape,
+                        &format!("{}…", &value[..width - 1]),
+                    )
+                } else {
+                    maybe_html_escape(html_escape, value)
+                }
+            })
+            .into()
     }
 
     fn get_indent_level(&self) -> usize {