fix(filters): always call splice() with 2 arguments or more

When calling `.splice()` without a 2nd argument (`deleteCount`), most browsers will splice to the
end of the array. As it turns out, this is the behavior specified in [ES2015][es6]. In [ES5][es5],
the spec seems to imply that nothing should happen.

To avoid inconsistent behavior among browsers implementing different versions of the EcmaScript
standart or when ES5 shims are included (e.g. https://github.com/es-shims/es5-shim/), this commit
ensures that all calls to `.splice()` provide at least two arguments.

[es5]: http://www.ecma-international.org/ecma-262/5.1/#sec-15.4.4.12
[es6]: http://www.ecma-international.org/ecma-262/6.0/#sec-array.prototype.splice

Fixes #14467

Closes #14489

src/ng/filter/filters.js

@@ -317,7 +317,7 @@ function formatNumber(number, pattern, groupSep, decimalSep, fractionSize) {
 
     // extract decimals digits
     if (integerLen > 0) {
-      decimals = digits.splice(integerLen);
+      decimals = digits.splice(integerLen, digits.length);
     } else {
       decimals = digits;
       digits = [0];
@@ -326,10 +326,10 @@ function formatNumber(number, pattern, groupSep, decimalSep, fractionSize) {
     // format the integer digits with grouping separators
     var groups = [];
     if (digits.length >= pattern.lgSize) {
-      groups.unshift(digits.splice(-pattern.lgSize).join(''));
+      groups.unshift(digits.splice(-pattern.lgSize, digits.length).join(''));
     }
     while (digits.length > pattern.gSize) {
-      groups.unshift(digits.splice(-pattern.gSize).join(''));
+      groups.unshift(digits.splice(-pattern.gSize, digits.length).join(''));
     }
     if (digits.length) {
       groups.unshift(digits.join(''));