Function stripTrailingChars

stripTrailingChars(s, charsToStrip, skipIfExactMatch): string
Removes trailing characters from a string if they match the specified substring.
Parameters
- s: string
  The input string from which trailing characters should be stripped.
- charsToStrip: string
  The substring to remove if it appears at the end of the input string.
- skipIfExactMatch: boolean
  If true, does not strip the trailing characters when the string is exactly equal to charsToStrip.
Returns string
The modified string with trailing characters stripped, or the original string if no match is found.
Example
```
stripTrailingChars("example.txt", ".txt", false); // "example"
stripTrailingChars("example.txt", ".txt", true);  // "example"
stripTrailingChars("file.txt", "txt", false);     // "file.txt" (no match)
stripTrailingChars(".txt", ".txt", true);         // ".txt" (exact match, not stripped)
```
- Defined in util.ts:699