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/num

@@ -5,22 +5,22 @@ SYNOPSIS
     num(x)
 
 TYPES
-    x		real
+    x           real
 
-    return	integer
+    return      integer
 
 DESCRIPTION
     For real x, den(x) returns the denominator of x.  In calc,
     real values are actually rational values.  Each calc real
     value can be uniquely expressed as:
 
-	n / d
+        n / d
 
     where:
 
-	n and d are integers
-	gcd(n,d) == 1
-	d > 0
+        n and d are integers
+        gcd(n,d) == 1
+        d > 0
 
     If x = n/x, then den(x) == n.
 
@@ -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:	1995/10/05 04:52:27
-## File existed as early as:	1995
+## Under source code control:   1995/10/05 04:52:27
+## 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/