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/inverse

@@ -11,9 +11,9 @@ TYPES
 
     For non-object x:
 
-    x		nonzero number (real or complex) or nonsingular matrix
+    x           nonzero number (real or complex) or nonsingular matrix
 
-    return	number or matrix
+    return      number or matrix
 
 DESCRIPTION
     For real or complex x, inverse(x) returns the value of 1/x.
@@ -31,10 +31,10 @@ EXAMPLE
     ; print inverse(A)
 
     mat [2,2] (4 elements, 4 nonzero):
-	[0,0] = -7
-	[0,1] = 3
-	[1,0] = 5
-	[1,1] = -2
+        [0,0] = -7
+        [0,1] = 3
+        [1,0] = 5
+        [1,1] = -2
 
 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:	1996/03/12 23:10:01
-## File existed as early as:	1996
+## Under source code control:   1996/03/12 23:10:01
+## File existed as early as:    1996
 ##
-## 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/