configure.ac minor improvements

* Shorter result message for "assume yes (cross compiling)"
* Replace grave accent + apostrophe quoting with just apostrophes.
  It is expected that Autoconf 2.72 updates the quoting as well and the
  old style has confused a syntax highlighter (Vim).

Signed-off-by: Kang-Che Sung <[email protected]>

configure.ac

@@ -149,7 +149,7 @@ dnl been updated in Autoconf 2.69, so use a workaround:
 m4_version_prereq([2.70], [],
 [if test "x$ac_cv_header_sys_mkdev_h" != xyes; then
  AC_CHECK_HEADER([sys/sysmacros.h], [AC_DEFINE([MAJOR_IN_SYSMACROS], [1],
- [Define to 1 if `major', `minor', and `makedev' are declared in <sys/sysmacros.h>.])])
+ [Define to 1 if 'major', 'minor', and 'makedev' are declared in <sys/sysmacros.h>.])])
 fi])
 
 # Optional Section
@@ -428,7 +428,7 @@ if test "x$enable_affinity" = xcheck; then
  AC_MSG_RESULT([yes])],
  [enable_affinity=no
  AC_MSG_RESULT([no])],
- [AC_MSG_RESULT([yes (assumed while cross compiling)])])
+ [AC_MSG_RESULT([assume yes (cross compiling)])])
  fi
 fi
 if test "x$enable_affinity" = xyes; then
@@ -493,7 +493,7 @@ case "$enable_hwloc" in
  PKG_CHECK_MODULES(HWLOC, hwloc, [
  CFLAGS="$CFLAGS $HWLOC_CFLAGS"
  LIBS="$LIBS $HWLOC_LIBS"
- AC_DEFINE([HAVE_LIBHWLOC], [1], [Define to 1 if you have the `hwloc' library (-lhwloc).])
+ AC_DEFINE([HAVE_LIBHWLOC], [1], [Define to 1 if you have the 'hwloc' library (-lhwloc).])
  ], [
  AC_CHECK_LIB([hwloc], [hwloc_get_proc_cpubind], [], [AC_MSG_ERROR([can not find required library libhwloc])])
  AC_CHECK_HEADERS([hwloc.h], [], [AC_MSG_ERROR([can not find require header file hwloc.h])])