/**
 * Linear character trims that replace ReDoS-prone anchored regex trims
 * (`/X+$/`, `/^X+|X+$/g`). Those are O(n²): with no start anchor the engine
 * retries the run at every position (CodeQL js/polynomial-redos). These scan
 * the string once. `ch` must be a single character.
 */
/** Remove every trailing occurrence of `ch`. */
export declare const trimEndChar: (value: string, ch: string) => string;
/** Remove every leading and trailing occurrence of `ch`. */
export declare const trimEdgeChar: (value: string, ch: string) => string;