docs(formatter): fix "leading" in currency and edits to limit_to

Author: naomiblack

lib/formatter/currency.dart

@@ -1,7 +1,7 @@
 part of angular.formatter_internal;
 
 /**
- * Formats a number as a currency (for example 1,234.56$).
+ * Formats a number as a currency (for example $1,234.56).
  *
  * When no currency symbol is provided, '$' is used. For more on formatters,
  * see the [angular:formatter](#angular-formatter) library.
@@ -22,7 +22,8 @@ class Currency implements Function {
    *
    *  - `value`: the value to format as currency.
    *  - `symbol`: the currency symbol to use. If no symbol is specified, `$` is used.
-   *  - `leading`: places the symbol in front of the number instead of following it.
+   *  - `leading`: when set to false, places the symbol after the number instead of before
+   *  it.
    */
   call(value, [symbol = r'$', leading = true]) {
     if (value is String) value = double.parse(value);

lib/formatter/limit_to.dart

@@ -8,19 +8,19 @@ part of angular.formatter_internal;
  *
  * Usage:
  *
- *     {{ expression | limitTo:_value_ }}
+ *     {{ expression | limitTo:_number_ }}
  *
  *
- *     <div ng-repeat="item in expression | limitTo:_value_">{{item}}</div>
+ *     <div ng-repeat="item in expression | limitTo:_number_">{{item}}</div>
  *
  *
- * Where the input expression is a [List] or [String], and `limitTo` evaluates to:
+ * Where the input expression is a [List] or [String], and `limitTo` is:
  *
- * - **a positive integer**: return _value_ items from the beginning of the list or string
+ * - **a positive integer**: return _number_ items from the beginning of the list or string
  * expression.
- * - **a negative integer**: return _value_ items from the end of the list or string expression.
- * - **null or non-integer**: return an empty list or string.
+ * - **a negative integer**: return _number_ items from the end of the list or string expression.
  * - **`|limitTo|` greater than the size of the expression**: return the entire expression.
+ * - **null** or all other cases: return an empty list or string.
  *
  * When operating on a [List], the returned list is always a copy even when all
  * the elements are being returned.