fixes #1056, added spaces on example guides (#1057)

Author: guness

guide/example/example-serializer-11.kt

@@ -27,7 +27,7 @@ object ColorAsObjectSerializer : KSerializer<Color> {
             var r = -1
             var g = -1
             var b = -1
-            while(true) {
+            while (true) {
                 when (val index = decodeElementIndex(descriptor)) {
                     0 -> r = decodeIntElement(descriptor, 0)
                     1 -> g = decodeIntElement(descriptor, 1)

guide/example/example-serializer-12.kt

@@ -31,7 +31,7 @@ object ColorAsObjectSerializer : KSerializer<Color> {
                 r = decodeIntElement(descriptor, 0)           
                 g = decodeIntElement(descriptor, 1)  
                 b = decodeIntElement(descriptor, 2)
-            } else while(true) {
+            } else while (true) {
                 when (val index = decodeElementIndex(descriptor)) {
                     0 -> r = decodeIntElement(descriptor, 0)
                     1 -> g = decodeIntElement(descriptor, 1)