doc: sample: switch to kebab-case

doc/sample/Expressions.im

@@ -1,12 +1,12 @@
-y = 1 + 2 * 3 / 4 * 5 - 6 + 7 multiplyBy:2.
-z = w = 2 + 3 multiplyBy:2.
-x = (((1 + 2 * 3) multiplyBy:3) add: 5) + 2.
-x = ((1 + 2 * 3) multiplyBy:3).
+y = 1 + 2 * 3 / 4 * 5 - 6 + 7 multiply-by:2.
+z = w = 2 + 3 multiply-by:2.
+x = (((1 + 2 * 3) multiply-by:3) add: 5) + 2.
+x = ((1 + 2 * 3) multiply-by:3).
 p = 5 multiply(by:3, add:(2 + 1)).
 q = 10 squared squared.
 
 p1
-    setAge:2 squared squared + 4 squared multiply(by:2, add:4 + 1 * 3)
+    set-age:2 squared squared + 4 squared multiply(by:2, add:4 + 1 * 3)
     in:"mon" + "ths".
 
 m = xz multiply(by:3 add:2) squared.
@@ -20,7 +20,7 @@ x = OrderedCollection new
 	yourself.
 
 age = Person new(name:"John Doe", age:34)
-    setAge:144 inUnit:"months";
+    set-age:144 in-unit:"months";
     ageInMonths.
 
 x = 5.
@@ -76,10 +76,10 @@ pkg = { 1, 2, 3, 4, 5 }.
 pkg = { 10, 2 => "Hello", 9, 5 => "World", 14 }.
 pkg = { { 0 }, { 1 }, { y for y in huh } }.
 
-pkg = { x multiplyBy:2 for x in wow if x > 2 }.
+pkg = { x multiply-by:2 for x in wow if x > 2 }.
 
 pkg->x = 32.
-k = (1 multiplyBy:2, 4).
+k = (1 multiply-by:2, 4).
 
 for (x, y) in pkg do
 	cout put:'{x}: {y}'
@@ -97,11 +97,11 @@ v = pkg->x.
 v = pkg at:'x'.
 
 pkg2 = {
-    onEnter => [
+    on-enter => [
         cout put:'start!'
     ],
 
-    onExit => [
+    on-exit => [
         cout put:'end!'
     ]
 }.