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/saveval

@@ -5,9 +5,9 @@ SYNOPSIS
     saveval(arg)
 
 TYPES
-    arg		any
+    arg         any
 
-    return	null value
+    return      null value
 
 DESCRIPTION
     When evaluation of a line of statements at top level starts, a
@@ -28,15 +28,15 @@ EXAMPLE
     ; saveval(1);
     ; a = 27;
     .
-	    27
+            27
     ; saveval(0);
     ; a = 45
     .
-	    27
+            27
     ; saveval(1);
     ; a = 63
     .
-	    63
+            63
 
 LIMITS
     none
@@ -55,7 +55,7 @@ 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
@@ -63,8 +63,8 @@ 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:	1997/09/06 20:03:35
-## File existed as early as:	1997
+## Under source code control:   1997/09/06 20:03:35
+## File existed as early as:    1997
 ##
-## 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/