Remove ::{{closure}} in more cases from function names (#230)

### Checklist

* [x] I have read the [Contributor Guide](../CONTRIBUTING.md)
* [x] I have read and agree to the [Code of
Conduct](../CODE_OF_CONDUCT.md)
* [x] I have added a description of my changes and why I'd like them
included in the section below

### Description of Changes

This removes all `::{{closure}}` from the suffix of a function name when
cleaning the name. Previously this was limited to 2.

This is noticeable with the changes made in #225 where the `main
function` being labeled as `main::{{closure}}`

### Before

![image](https://github.com/user-attachments/assets/a484973e-088e-48cc-bef8-589db8b9bfd4)

### After 
![Screenshot 2024-08-05
131903](https://github.com/user-attachments/assets/84830f94-9d2b-4249-9295-e7d4896ad958)

puffin/src/lib.rs

@@ -178,10 +178,13 @@ macro_rules! current_function_name {
     }};
 }
 
-/// Automatically name the profiling scope based on function name.
+/// Automatically name the profiling scope based on the function name.
 ///
 /// Names should be descriptive, ASCII and without spaces.
 ///
+/// [`profile_function`] should only be used for the outermost scope of a function
+/// and not for lambdas. For other use-cases please use [`profile_scope`]
+///
 /// Example:
 /// ```
 /// # struct Image {};

puffin/src/utils.rs

@@ -1,7 +1,8 @@
 // The macro defines 'f()' at the place where macro is called.
-// This code is located at the place of call and two closures deep.
+// This code is typically located at the place of call and two closures deep.
 // Strip away this useless suffix.
-pub(crate) const USELESS_SCOPE_NAME_SUFFIX: &str = "::{{closure}}::{{closure}}::f";
+pub(crate) const USELESS_SCOPE_NAME_SUFFIX: &str = "::f";
+pub(crate) const USELESS_CLOSURE_SUFFIX: &str = "::{{closure}}";
 
 #[doc(hidden)]
 #[inline(never)]
@@ -10,7 +11,8 @@ pub fn clean_function_name(name: &str) -> String {
         // Probably the user registered a user scope name.
         return name.to_owned();
     };
-    shorten_rust_function_name(name)
+    // Remove any additional trailing suffixes
+    shorten_rust_function_name(name.trim_end_matches(USELESS_CLOSURE_SUFFIX))
 }
 
 /// Shorten a rust function name by removing the leading parts of module paths.