Clarify docs for `formatNum` to indicate that the lack of the fourth parameter means the third parameter is treated as the number of significant digits.
@@ -603,10 +603,9 @@ It takes 1 required and 4 optional arguments.
NOTE: see http://userguide.icu-project.org/locale for more "numbers"
keywords
-1. The minimum number of fractional digits to display. If this is specified but
- the fourth parameter (maximum number of fractional digits), then this is
- interpreted as significant digits. If you wish to have trailing zeros
- removed, minFractionalDigits should be set to 0.
+1. If called with 4 arguments only, the number of significant digits, otherwise
+ the minimum number of fractional digits to display. A value of 0 removes
+ trailing zeros.
1. The maximum number of fractional digits to display.
