Remove stray '@' from install.texi (was Re: [PATCH] Delete GCJ)

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On Tue, 2016-11-29 at 14:23 -0700, Jeff Law wrote:
> On 11/21/2016 04:23 PM, Matthias Klose wrote:
> > On 21.11.2016 18:16, Rainer Orth wrote:
> > > Hi Matthias,
> > > 
> > > > ahh, didn't see that :-/ Now fixed, is this clearer now?
> > > > 
> > > > The options @option{--with-target-bdw-gc-include} and
> > > > @option{--with-target-bdw-gc-lib} must always specified
> > > > together for
> > >                                                ^ be
> > 
> > thanks to all sorting out the documentation issues. Now attaching
> > the updated
> > diff. Ok to commit?
> > 
> > Matthias
> > 
> > 

[...]

> > gcc/
> > 
> > 2016-11-19  Matthias Klose  <[email protected]>
> > 
> >         * doc/install.texi: Document configure options --enable
> > -objc-gc
> >         and --with-target-bdw-gc.

[...]

r242985 seems to have broken the build, for me at least (with texinfo
5.1):

../../src/gcc/doc/install.texi:2199: use braces to give a command as an argument to @=
make[2]: *** [doc/gccinstall.info] Error 1

The attached patch fixes it.

OK to commit?
Dave
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