Swift: QLDoc for NilCoalescingExpr.qll

Author: rdmarsh2

swift/ql/lib/codeql/swift/elements/expr/NilCoalescingExpr.qll

@@ -1,8 +1,13 @@
+/**
+ * Provides a class for the Swift nil-coalesing expr (`??`)
+ */
+
 private import codeql.swift.elements.expr.Expr
 private import codeql.swift.elements.expr.BinaryExpr
 
+/**
+ * A Swift nil-coalesing expr (`??`).
+ */
 class NilCoalescingExpr extends BinaryExpr {
-    NilCoalescingExpr() {
-        this.getStaticTarget().getName() = "??(_:_:)"
-    }
-}
+  NilCoalescingExpr() { this.getStaticTarget().getName() = "??(_:_:)" }
+}