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import lowerCase from "./lowerCase.ts";
import nonWordRegexp from "./vendor/nonWordRegexp.ts";import camelCaseRegexp from "./vendor/camelCaseRegexp.ts";import camelCaseUpperRegexp from "./vendor/camelCaseUpperRegexp.ts";
/** * Convert a `string` to normal case. * * Example: * * ```ts * normalCase("test string"); * //=> "test string" * * normalCase("testString"); * //=> "test string" * * normalCase("Test-String"); * //=> "test string" * ``` */export default function normalCase(  str: string,  locale?: string,  replacement?: string,): string {  if (str == null) {    return "";  }
  replacement = typeof replacement !== "string" ? " " : replacement;
  function replace(match: string, index: number, value: string): string {    if (index === 0 || index === value.length - match.length) {      return "";    }
    return replacement!;  }
  str = String(str)    // Support camel case ("camelCase" -> "camel Case").    .replace(camelCaseRegexp, "$1 $2")    // Support odd camel case ("CAMELCase" -> "CAMEL Case").    .replace(camelCaseUpperRegexp, "$1 $2")    // Remove all non-word characters and replace with a single space.    .replace(nonWordRegexp, replace);
  // Lower case the entire string.  return lowerCase(str, locale);}