Removed trailing colon in reference

Also prepended "see" to the references and fixed a triple space after
a period.

doc/manual/functions.rst

@@ -622,8 +622,8 @@ convenient for data processing, but in other languages vectorization is also
 often required for performance: if loops are slow, the "vectorized" version of a
 function can call fast library code written in a low-level language.   In Julia,
 vectorized functions are *not* required for performance, and indeed it is often
-beneficial to write your own loops (:ref:`man-performance-tips`:), but they can
-still be convenient.  Therefore, *any* Julia function ``f`` can be applied
+beneficial to write your own loops (see :ref:`man-performance-tips`), but they
+can still be convenient.  Therefore, *any* Julia function ``f`` can be applied
 elementwise to any array (or other collection) with the syntax ``f.(A)``.
 
 Of course, you can omit the dot if you write a specialized "vector" method
@@ -634,7 +634,7 @@ which functions you want to vectorize.
 More generally, ``f.(args...)`` is actually equivalent to
 ``broadcast(f, args...)``, which allows you to operate on multiple
 arrays (even of different shapes), or a mix of arrays and scalars
-(:ref:`man-broadcasting`:).   For example, if you have ``f(x,y) = 3x + 4y``,
+(see :ref:`man-broadcasting`).  For example, if you have ``f(x,y) = 3x + 4y``,
 then ``f.(pi,A)`` will return a new array consisting of ``f(pi,a)`` for each
 ``a`` in ``A``, and ``f.(vector1,vector2)`` will return a new vector
 consisting of ``f(vector1[i],vector2[i])`` for each index ``i``