idea/resources-en/inspectionDescriptions/ReplaceSubstringWithIndexingOperation.html - platform/external/jetbrains/kotlin - Git at Google

 <html>
 <body>
 This inspection reports calls like <b>"abc".substring(0, 1)</b> replaceable with <b>"abc"[0]</b>.
 </body>
 </html>
	<html>
	<body>
	This inspection reports calls like <b>"abc".substring(0, 1)</b> replaceable with <b>"abc"[0]</b>.
	</body>
	</html>