Installing the Emacs executable

[Eli Zaretskii]

"make install" installs 2 executables: 'emacs-24.3.50' and 'emacs'
that is a symlink to 'emacs-24.3.50'.  It also installs
DOC-24.3.50.nn, where nn is the serial number of the build of this
version of Emacs in the build tree.

The next time you build and "make install", you get the same
'emacs-24.3.50' (which is a different executable) and DOC-24.3.50.nn+1
as its DOC file.  The previous DOC-24.3.50.nn is deleted.

Is this done on purpose?  Why isn't the binary named the same as its
DOC, i.e. emacs-24.3.50.nn?