diff --git a/.swiftlint.yml b/.swiftlint.yml
index 78bff2f..8d99afc 100755
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@@ -56,6 +56,12 @@ custom_rules:
     name: "If as Guard"
     message: "Don't use an if statement to just return – use guard for such cases instead."
     severity: warning
+  inline_comment_space:
+    included: ".*.swift"
+    regex: '[^\s(\/\/)]+([ ]{2,}|)(?<!:)\/\/'
+    name: "Inline comment space"
+    message: "An inline comment should always have one single leading whitespace."
+    severity: warning
   late_force_unwrapping:
     included: ".*.swift"
     regex: '\(\S+\?\.\S+\)!'
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 622652f..1052b02 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 # Contributing
 
-Controbutions are very much welcomed. In fact, this repository lives from creative proposals on how to make use of the ability to create custom collections.
+Contributions are very much welcomed. In fact, this repository lives from creative proposals on how to make use of the ability to create custom collections.
 
 ## Tutorial