[librsvg: 3/10] Comment what a function does

[Federico Mena Quintero <federico src gnome org>]

commit 86e0b32c45e38329de39fba91f20fc8b49302478
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Apr 30 21:38:40 2019 -0500

    Comment what a function does

 rsvg_internals/src/css.rs | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/rsvg_internals/src/css.rs b/rsvg_internals/src/css.rs
index 9bec5ba1..8eba611d 100644
--- a/rsvg_internals/src/css.rs
+++ b/rsvg_internals/src/css.rs
@@ -129,6 +129,8 @@ impl CssRules {
         }
     }
 
+    /// Takes CSS rules which match the given `selector` name and applies them
+    /// to the `values`.
     pub fn lookup_apply(
         &self,
         selector: &str,