Update rule.adoc

rules/S7456/rust/rule.adoc

@@ -1,44 +1,26 @@
-FIXME: add a description
-
-// If you want to factorize the description uncomment the following line and create the file.
-//include::../description.adoc[]
 
 == Why is this an issue?
+Using `.skip(0)` on an iterator does nothing, which is likely to be a mistake. It is more probable that `.skip(1)` was intended to skip the first element, or if not, the `.skip(0)` call should be removed to avoid confusion and make the code clearer.
 
-FIXME: remove the unused optional headers (that are commented out)
-
-//=== What is the potential impact?
-
-== How to fix it
-//== How to fix it in FRAMEWORK NAME
 
 === Code examples
 
 ==== Noncompliant code example
-
 [source,rust,diff-id=1,diff-type=noncompliant]
 ----
-FIXME
+let v = vec![1, 2, 3];
+let x = v.iter().skip(0).collect::<Vec<_>>(); // Noncompliant: .skip(0) does nothing
 ----
 
 ==== Compliant solution
 
 [source,rust,diff-id=1,diff-type=compliant]
 ----
-FIXME
+let v = vec![1, 2, 3];
+let x = v.iter().collect::<Vec<_>>(); // Compliant: No .skip(0) call makes the intent clear
 ----
 
-//=== How does this work?
+== Resources
+=== Documentation
 
-//=== Pitfalls
-
-//=== Going the extra mile
-
-
-//== Resources
-//=== Documentation
-//=== Articles & blog posts
-//=== Conference presentations
-//=== Standards
-//=== External coding guidelines
-//=== Benchmarks
+* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#iter_skip_zero