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/isident

@@ -5,9 +5,9 @@ SYNOPSIS
     isident(m)
 
 TYPES
-    m		any
+    m           any
 
-    return	int
+    return      int
 
 DESCRIPTION
     This function returns 1 if m is an 2 dimensional identity matrix,
@@ -16,7 +16,7 @@ DESCRIPTION
 EXAMPLE
     ; mat x[3,3] = {1,0,0,0,1,0,0,0,1};
     ; isident(x)
-	    1
+            1
 
 LIMITS
     none
@@ -39,7 +39,7 @@ 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
@@ -47,8 +47,8 @@ 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:	1995/07/09 18:25:36
-## File existed as early as:	1995
+## Under source code control:   1995/07/09 18:25:36
+## 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/