Make behaviour of Eof() more consistent

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@36299 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/inputstr.tex

@@ -52,15 +52,16 @@ If EOF, return value is undefined and LastRead() will return 0 and not 1.
 
 \constfunc{bool}{Eof}{\void}
 
-Returns true if the end of stream has been reached.
+Returns true after an attempt has been made to read past the end of the
+stream.
 
 \wxheading{Note}
 
-For some streams Eof() will not return true until an
+In wxWidgets 2.6.x and below some streams returned Eof() when the last
-attempt has been made to read past the end of the stream.
+byte had been read rather than when an attempt had been made to read
-\helpref{LastRead()}{wxinputstreamlastread}
+past the last byte. If you want to avoid depending on one behaviour or
-should be called after each read to check that
+the other then call \helpref{LastRead()}{wxinputstreamlastread} to
-a non-zero number of bytes have been read.
+check the number of bytes actually read.
 
 \membersection{wxInputStream::LastRead}\label{wxinputstreamlastread}