Add more documentation for string functions (see JuliaLang#2147 & JuliaLang#2242)

Author: dirk

doc/stdlib/base.rst

@@ -227,6 +227,12 @@ General Collections
 
    For ordered, indexable collections, the maximum index ``i`` for which ``ref(collection, i)`` is valid. For unordered collections, the number of elements.
 
+.. function:: endof(collection) -> Integer
+
+   Returns the last index of the collection.
+   
+   **Example**: ``endof([1,2,4]) = 3``
+
 Fully implemented by: ``Range``, ``Range1``, ``Tuple``, ``Number``, ``AbstractArray``, ``IntSet``, ``Dict``, ``WeakKeyDict``, ``String``, ``Set``.
 
 Partially implemented by: ``FDSet``.
@@ -314,6 +320,10 @@ Iterable Collections
 
    **Example**: ``map((x) -> x * 2, [1, 2, 3]) = [2, 4, 6]``
 
+.. function:: map!(function, collection)
+
+   In-place version of :func:`map`.
+
 .. function:: mapreduce(f, op, itr)
 
    Applies function ``f`` to each element in ``itr`` and then reduces the result using the binary function ``op``.
@@ -517,7 +527,7 @@ Dequeues
 
    Remove items at specified range.
 
-.. function:: grow!(collection, n) -> collectionf
+.. function:: resize!(collection, n) -> collection
 
    Resize collection to contain ``n`` elements.
 
@@ -582,6 +592,26 @@ Strings
 
    Convert a string to a contiguous UTF-8 string (all characters must be valid UTF-8 characters).
 
+.. function:: is_valid_ascii(s) -> Bool
+
+   Returns true if the string is valid ASCII, false otherwise.
+
+.. function:: is_valid_utf8(s) -> Bool
+
+   Returns true if the string is valid UTF-8, false otherwise.
+
+.. function:: check_ascii(s)
+
+   Calls :func:`is_valid_ascii` on string. Throws error if it is not valid.
+
+.. function:: check_utf8(s)
+
+   Calls :func:`is_valid_utf8` on string. Throws error if it is not valid.
+
+.. function:: byte_string_classify(s)
+
+   Returns 0 if the string is neither valid ASCII nor UTF-8, 1 if it is valid ASCII, and 2 if it is valid UTF-8.
+
 .. function:: search(string, char, [i])
 
    Return the index of ``char`` in ``string``, giving 0 if not found. The second argument may also be a vector or a set of characters. The third argument optionally specifies a starting index.