fun replaceFirst( input: CharSequence, replacement: String ): String
Replaces the first occurrence of this regular expression in the specified input string with specified replacement expression.
replacement - A replacement expression that can include substitutions. See Matcher.appendReplacement for details.
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/-regex/replace-first.html