Adding the beginning quote seems more consistent than removing the trailing one.
Index: Makefile =================================================================== RCS file: /cvs/src/Makefile,v retrieving revision 1.123 diff -u -p -r1.123 Makefile --- Makefile 26 Aug 2014 20:19:25 -0000 1.123 +++ Makefile 26 May 2015 04:37:49 -0000 @@ -27,7 +27,7 @@ # # 5) If you want to setup a cross-build environment, there is a "cross-gcc" # target available which upon completion of: -# make -f Makefile.cross TARGET=<target> cross-gcc" +# "make -f Makefile.cross TARGET=<target> cross-gcc" # (where <target> is one of the names in the /sys/arch directory) will produce # a set of compilation tools along with the includes in the /usr/cross/<target> # directory. The "cross-distrib" target will build cross-tools as well as