Tweaks to other samples to accommodate strings-and-runes

Add a link to the range sample, and remove partial mentions of this
topic in string-functions since it's now covered well in
strings-and-runes

examples/range/range.go

@@ -42,6 +42,8 @@ func main() {
 	// `range` on strings iterates over Unicode code
 	// points. The first value is the starting byte index
 	// of the `rune` and the second the `rune` itself.
+	// See [Strings and Runes](strings-and-runes) for more
+	// details.
 	for i, c := range "go" {
 		fmt.Println(i, c)
 	}

examples/range/range.hash

@@ -1,2 +1,2 @@
-c7d9ae9ed081fb4bbf27ef45242fbb39bbae3d4c
-pdZOtv4g-7J
+c8da490660d234fc420f39d9b8a4aba27f8aba46
+kRsyWNmLFLz

examples/string-functions/string-functions.go

@@ -35,17 +35,4 @@ func main() {
 	p("ToLower:   ", s.ToLower("TEST"))
 	p("ToUpper:   ", s.ToUpper("test"))
 	p()
-
-	// Not part of `strings`, but worth mentioning here, are
-	// the mechanisms for getting the length of a string in
-	// bytes and getting a byte by index.
-	p("Len: ", len("hello"))
-	p("Char:", "hello"[1])
 }
-
-// Note that `len` and indexing above work at the byte level.
-// Go uses UTF-8 encoded strings, so this is often useful
-// as-is. If you're working with potentially multi-byte
-// characters you'll want to use encoding-aware operations.
-// See [strings, bytes, runes and characters in Go](https://blog.golang.org/strings)
-// for more information.

examples/string-functions/string-functions.hash

@@ -1,2 +1,2 @@
-33b15b8c999ba65564b965b96cbfeadac0d1637d
-fZ_FqN5WlSz
+2201eba7e3b9339a6e700a4faa9b085c43dd1ed2
+pE_KNt12Zv9

examples/string-functions/string-functions.sh

@@ -11,6 +11,3 @@ Replace:    f0o
 Split:      [a b c d e]
 ToLower:    test
 ToUpper:    TEST
-
-Len:  5
-Char: 101