Use "conversion" instead of "cast", per spec

Closes #200

examples/base64-encoding/base64-encoding.go

@@ -17,7 +17,7 @@ func main() {
     // Go supports both standard and URL-compatible
     // base64. Here's how to encode using the standard
     // encoder. The encoder requires a `[]byte` so we
-    // cast our `string` to that type.
+    // convert our `string` to that type.
     sEnc := b64.StdEncoding.EncodeToString([]byte(data))
     fmt.Println(sEnc)
 

examples/base64-encoding/base64-encoding.hash

@@ -1,2 +1,2 @@
-e57f5be3a796261fb4a55cdb0580a254e14b4930
-t6rFm2x4Yr
+c20da14820b656c867790f2e99bc37140babca8c
+y_QTcqdkvZh

examples/constants/constants.go

@@ -22,7 +22,7 @@ func main() {
     fmt.Println(d)
 
     // A numeric constant has no type until it's given
-    // one, such as by an explicit cast.
+    // one, such as by an explicit conversion.
     fmt.Println(int64(d))
 
     // A number can be given a type by using it in a

examples/constants/constants.hash

@@ -1,2 +1,2 @@
-3de4f16f1ed032378268411b2173b95e8000305d
-T5sj0eINnp
+2f2ec3a5ff4eef280199da1908eed261346fb40e
+VhP0f8moZd3

examples/json/json.go

@@ -85,14 +85,14 @@ func main() {
     fmt.Println(dat)
 
     // In order to use the values in the decoded map,
-    // we'll need to cast them to their appropriate type.
-    // For example here we cast the value in `num` to
+    // we'll need to convert them to their appropriate type.
+    // For example here we convert the value in `num` to
     // the expected `float64` type.
     num := dat["num"].(float64)
     fmt.Println(num)
 
     // Accessing nested data requires a series of
-    // casts.
+    // conversions.
     strs := dat["strs"].([]interface{})
     str1 := strs[0].(string)
     fmt.Println(str1)

examples/json/json.hash

@@ -1,2 +1,2 @@
-43e8d66fb862ea224994ca766e5689a96016f7ca
-UGeNKd-cw34
+d4dc2281f64061f077d8f1e9687538f41a339b25
+xC6SHbzGBZC

examples/sorting-by-functions/sorting-by-functions.go

@@ -33,8 +33,8 @@ func (s byLength) Less(i, j int) bool {
 }
 
 // With all of this in place, we can now implement our
-// custom sort by casting the original `fruits` slice to
-// `byLength`, and then use `sort.Sort` on that typed
+// custom sort by converting the original `fruits` slice
+// to `byLength`, and then use `sort.Sort` on that typed
 // slice.
 func main() {
     fruits := []string{"peach", "banana", "kiwi"}

examples/sorting-by-functions/sorting-by-functions.hash

@@ -1,2 +1,2 @@
-a5bcb1620c62f89f8253d7d2a2580b5ae48771b6
-4b7_qiGp33y
+6a04058b564d5741815e523f97f240ee6563cb15
+y3kuCwIFRYK