Uses \ as tag separator

todotxt/todo.txt#13

docs/README.md

@@ -31,8 +31,8 @@ I tried to develop a clear interface without surprises, but you can easily
 miss some feature:
 
 * Double click on a feature, *everywhere*, open the edit panel;
-* You can create sub-projects (or sub-contexts) by adding a dash. For example,
-  the project `+work-admin-automation` create this arborescence:
+* You can create sub-projects (or sub-contexts) by adding a backslash. For
+* example, the project `+work\admin\automation` create this arborescence:
 
 ```txt
 work

src/tasks/task.rs

@@ -25,7 +25,7 @@ impl Task {
             })
             .into_owned();
 
-        let regex = ::regex::Regex::new(r"(?P<space>^|[\s])(?P<tag>[\+@][\w\-]+)").unwrap();
+        let regex = ::regex::Regex::new(r"(?P<space>^|[\s])(?P<tag>[\+@][\w\-\\]+)").unwrap();
         subject = regex
             .replace_all(&subject, "$space<b>$tag</b>")
             .into_owned();

src/widgets/filter.rs

@@ -60,14 +60,15 @@ impl Filter {
         use gtk::ToValue;
         use std::slice::SliceConcatExt;
 
+        let separator = '\\';
         let (filter, (done, total)) = filter;
         let progress = (done as f32 / total as f32) * 100.;
         let f = filter.clone();
 
-        let mut levels: Vec<_> = f.split('-').collect();
+        let mut levels: Vec<_> = f.split(separator).collect();
         let title = levels.pop().unwrap();
 
-        let parent = levels.join("-");
+        let parent = levels.join(&separator.to_string());
 
         if !parent.is_empty() && root.get(&parent).is_none() {
             self.append(root, (parent.clone(), (0, 0)));