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/head

@@ -5,10 +5,10 @@ SYNOPSIS
     head(x, y)
 
 TYPES
-    x		list
-    y		int
+    x           list
+    y           int
 
-    return	list
+    return      list
 
 DESCRIPTION
     If 0 <= y <= size(x), head(x,y) returns a list of size y whose
@@ -29,15 +29,15 @@ EXAMPLE
     ; head(A, 2)
 
     list (2 members, 2 nonzero):
-	  [[0]] = 2
-	  [[1]] = 3
+          [[0]] = 2
+          [[1]] = 3
 
     ; head(A, -2)
 
     list (3 members, 3 nonzero):
-	  [[0]] = 2
-	  [[1]] = 3
-	  [[2]] = 5
+          [[0]] = 2
+          [[1]] = 3
+          [[2]] = 5
 
 LIMITS
     none
@@ -56,7 +56,7 @@ 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
@@ -64,8 +64,8 @@ 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:	1995/07/10 02:09:30
-## File existed as early as:	1995
+## Under source code control:   1995/07/10 02:09:30
+## File existed as early as:    1995
 ##
-## 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/