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/isobjtype

@@ -5,9 +5,9 @@ SYNOPSIS
     isobjtype(str)
 
 TYPES
-    str		string
+    str         string
 
-    return	0 or 1
+    return      0 or 1
 
 DESCRIPTION
     isobjtype(str) returns 1 or 0 according as an object type with name
@@ -15,11 +15,11 @@ DESCRIPTION
 
 EXAMPLE
     ; isobjtype("xy")
-	0
+        0
 
     ; obj xy {x, y}
     ; isobjtype("xy")
-	1
+        1
 
 LIMITS
     none
@@ -42,7 +42,7 @@ 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
@@ -50,8 +50,8 @@ 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:	1997/04/05 14:10:17
-## File existed as early as:	1997
+## Under source code control:   1997/04/05 14:10:17
+## 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/