implemented (separate) punctuation-style for stack and bookmarks

src/util.rs

@@ -0,0 +1,19 @@
+use std::{
+    io::Result,
+    path::{Component, PathBuf},
+};
+
+pub fn to_lexical_absolute(path: PathBuf) -> Result<PathBuf> {
+    let mut absolute = if path.is_absolute() {
+        std::path::PathBuf::new()
+    } else {
+        std::env::current_dir()?
+    };    for component in path.components() {
+        match component {
+            Component::CurDir => {},
+            Component::ParentDir => { absolute.pop(); },
+            component @ _ => absolute.push(component.as_os_str()),
+        }
+    }
+    Ok(absolute)
+}