message: Fixes Adding note regarding forward slash.
diff: @@ -186,10 +186,11 @@ first translate the Stan program to \Cpp, then compile the \Cpp code
  to an executable.)
  A Stan program must be in a file with the file extension
  -\code{.stan}. To create an executable from a Stan program,
  -\code{make} will be called with the name of the executable as its
  -argument. For Mac and Linux, it is the name of the Stan program with
  -the \code{.stan} omitted. For Windows, replace \code{.stan} with
  +\code{.stan}. To create an executable from a Stan program, \code{make}
  +will be called with the name of the executable as its argument. For
  +Mac and Linux, it is the name of the Stan program with the
  +\code{.stan} omitted. For Windows, replace .stan with .exe, and make
  +sure that the path is given with slashes and not backslashes.
  \code{.exe}.
  To build the Bernoulli example, use the following command for Mac and
  @@ -202,7 +203,7 @@ Linux:
  \end{quote}
  %
  For Windows, the command is the same with the addition of \code{.exe}
  -at the end of the target:
  +at the end of the target (note: use forward slashes):
  \begin{quote}
  \begin{Verbatim}[fontshape=sl]
  > make examples/bernoulli/bernoulli.exe
  @@ -959,4 +960,3 @@ and on Windows with
  %% matrices) or may be misformulated. In a future version of Stan, we
  %% plan to rank such messages by severity and turn this one off by
  %% default so as not to needlessly worry users.
  -
  