trimIndentAfterFirstLine

Removes the indentation from every line in this string after the first line, and also removes any blank lines appearing before the first non-blank line.

This method assumes the original string has multiple lines. The first line is left intact, but all subsequent lines have their leading white space removed.

Example usage:

val text = """
    Keep leading
        Remove indent
    Remove indent
"""
val result = text.trimIndentAfterFirstLine()
// Result is:
// """
// Keep leading
// Remove indent
// Remove indent
// """