replace tabs by spaces, adjust spacing

Author: dimpase

build/pkgs/qhull/spkg-configure.m4

@@ -4,22 +4,23 @@ SAGE_SPKG_CONFIGURE([qhull], [
     AS_IF([test x$QHULL = x], [
            AC_MSG_NOTICE([qhull not found. Installing qhull])
            sage_spkg_install_qhull=yes
-	   ], [
+    ], [
            AC_MSG_CHECKING([is qhull's version good enough? ])
            qhull_ver=`$QHULL -V | cut -d' ' -f2 2>> config.log`
            AX_COMPARE_VERSION([$qhull_ver], [ge], [$SAGE_QHULL_MINVER], [
                AC_MSG_RESULT([yes.])
                AC_MSG_CHECKING([is qhull_r library and headers installed? ])
                AC_CHECK_HEADER([libqhull_r/libqhull_r.h], [
-	        AC_SEARCH_LIBS([qh_distplane], [qhull_r], [
-                  AC_MSG_RESULT([yes. Use system's qhull])
-	       	  ], [
+                  AC_SEARCH_LIBS([qh_distplane], [qhull_r], [
+                     AC_MSG_RESULT([yes. Use system's qhull])
+                  ], [
                   AC_MSG_RESULT([no. Install qhull])
                   sage_spkg_install_qhull=yes]) dnl SEARCH_LIBS
-	       ], [
-               AC_MSG_RESULT([no. Install qhull])
-               sage_spkg_install_qhull=yes]) dnl CHECK_HEADER
-	   ]) dnl COMPARE_VERSION
+               ], [
+                  AC_MSG_RESULT([no. Install qhull])
+                  sage_spkg_install_qhull=yes
+               ]) dnl CHECK_HEADER
+     ]) dnl COMPARE_VERSION
     ]) dnl IF
     m4_popdef([SAGE_QHULL_MINVER])
 ])