Mention shorthand syntax for labels

src/content/chapter1_functions/lesson08_labelled_arguments/code.gleam

@@ -9,6 +9,17 @@ pub fn main() {
 
   // Using the labels in a different order
   io.debug(calculate(1, multiply: 3, add: 2))
+
+  // You may have some local variables declared
+  let multiply = 3
+  let add = 2
+
+  // You can specify the variables by name when calling the function
+  io.debug(calculate(1, add: add, multiply: multiply))
+
+  // Or use shorthand syntax, if the variable names match the names of the
+  // labelled arguments
+  io.debug(calculate(1, add:, multiply:))
 }
 
 fn calculate(value: Int, add addend: Int, multiply multiplier: Int) {

src/content/chapter1_functions/lesson08_labelled_arguments/en.html

@@ -19,5 +19,8 @@
   Labels are optional when calling a function, it is up to the programmer to
   decide what is clearest in their code.
 </p>
-
-
+<p>
+  Additionally, when local variables have the same name as the labelled
+  argument, the variable name can be omitted when calling the function. This is
+  known as shorthand syntax for labels.
+</p>