Update rule.adoc

rules/S7456/metadata.json

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+{
+}

rules/S7456/rust/metadata.json

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+{
+  "title": "`skip(0)` should not be used on iterators",
+  "type": "BUG",
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "5min"
+  },
+  "tags": [
+    "clippy"
+  ],
+  "defaultSeverity": "Major",
+  "ruleSpecification": "RSPEC-7456",
+  "sqKey": "S7456",
+  "scope": "All",
+  "defaultQualityProfiles": ["Sonar way"],
+  "quickfix": "unknown",
+  "code": {
+    "impacts": {
+      "RELIABILITY": "MEDIUM"
+    },
+    "attribute": "LOGICAL"
+  }
+}

rules/S7456/rust/rule.adoc

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+
+== 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.
+
+
+=== Code examples
+
+==== Noncompliant code example
+[source,rust,diff-id=1,diff-type=noncompliant]
+----
+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]
+----
+let v = vec![1, 2, 3];
+let x = v.iter().collect::<Vec<_>>(); // Compliant: No .skip(0) call makes the intent clear
+----
+
+== Resources
+=== Documentation
+
+* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#iter_skip_zero