Fix range inclusivity in String.indices

libraries/stdlib/src/kotlin/text/Strings.kt

@@ -50,8 +50,8 @@ public val CharSequence.size: Int
 public val String.size: Int
     get() = length()
 
-public val String.indices : IntRange
+public val String.indices: IntRange
-    get() = 0..size
+    get() = 0..length() - 1
 
 /**
  * Returns a subsequence specified by given set of indices.

libraries/stdlib/test/text/StringTest.kt

@@ -62,4 +62,10 @@ class StringTest {
         assertEquals("4321", "1234".reverse())
         assertEquals("", "".reverse())
     }
+
+    test fun indices() {
+        assertEquals(0..4, "abcde".indices)
+        assertEquals(0..0, "a".indices)
+        assertEquals(IntRange.EMPTY, "".indices)
+    }
 }