convert ASCII TABs to ASCII SPACEs

Converted all ASCII tabs to ASCII spaces using a 8 character
tab stop, for all files, except for all Makefiles (plus rpm.mk).
The `git diff -w` reports no changes.

help/perm

@@ -5,17 +5,17 @@ SYNOPSIS
     perm(x, y)
 
 TYPES
-    x		int
-    y		int
+    x           int
+    y           int
 
-    return	int
+    return      int
 
 DESCRIPTION
     Return the permutation number P(x,y) which is defined as:
 
-	       x!
-	    --------
-	     (x-y)!
+               x!
+            --------
+             (x-y)!
 
     This function computes the number of permutations in which y things
     may be chosen from x items where order in which they are chosen matters.
@@ -45,7 +45,7 @@ SEE ALSO
 ##
 ## Calc is distributed in the hope that it will be useful, but WITHOUT
 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-## or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU Lesser General
+## or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
 ## Public License for more details.
 ##
 ## A copy of version 2.1 of the GNU Lesser General Public License is
@@ -53,8 +53,8 @@ SEE ALSO
 ## received a copy with calc; if not, write to Free Software Foundation, Inc.
 ## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 ##
-## Under source code control:	1994/10/20 04:03:02
-## File existed as early as:	1994
+## Under source code control:   1994/10/20 04:03:02
+## File existed as early as:    1994
 ##
-## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
-## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/
+## chongo <was here> /\oo/\     http://www.isthe.com/chongo/
+## Share and enjoy!  :-)        http://www.isthe.com/chongo/tech/comp/calc/