update doc for copy!. fixes JuliaLang#4689

Author: JeffBezanson

doc/stdlib/base.rst

@@ -4719,6 +4719,15 @@ C Interface
    Copy ``N`` elements from a source array to a destination, starting at offset ``so``
    in the source and ``do`` in the destination.
 
+.. function:: copy!(dest, src)
+
+   Copy all elements from collection ``src`` to array ``dest``.
+
+.. function:: copy!(dest, do, src, so, N)
+
+   Copy ``N`` elements from collection ``src`` starting at offset ``so``, to
+   array ``dest`` starting at offset ``do``.
+
 .. function:: pointer(a[, index])
 
    Get the native address of an array element. Be careful to ensure that a julia

doc/stdlib/linalg.rst

@@ -427,11 +427,6 @@ Usually a function has 4 methods defined, one each for ``Float64``,
 
 .. currentmodule:: Base
 
-.. function:: copy!(n, X, incx, Y, incy)
-
-   Copy ``n`` elements of array ``X`` with stride ``incx`` to array
-   ``Y`` with stride ``incy``.  Returns ``Y``.
-
 .. function:: dot(n, X, incx, Y, incy)
 
    Dot product of two vectors consisting of ``n`` elements of array
@@ -443,6 +438,11 @@ The following functions are defined within the ``Base.LinAlg.BLAS`` module.
 
 .. currentmodule:: Base.LinAlg.BLAS
 
+.. function:: blascopy!(n, X, incx, Y, incy)
+
+   Copy ``n`` elements of array ``X`` with stride ``incx`` to array
+   ``Y`` with stride ``incy``.  Returns ``Y``.
+
 .. function:: nrm2(n, X, incx)
 
    2-norm of a vector consisting of ``n`` elements of array ``X`` with