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.

lib_calc.h

@@ -9,7 +9,7 @@
  *
  * 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
@@ -17,11 +17,11 @@
  * 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:	1997/03/23 18:37:10
- * File existed as early as:	1997
+ * Under source code control:   1997/03/23 18:37:10
+ * 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/
  */
 
 
@@ -30,7 +30,7 @@
 
 #include <setjmp.h>
 
-#if defined(CALC_SRC)	/* if we are building from the calc source tree */
+#if defined(CALC_SRC)   /* if we are building from the calc source tree */
 # include "decl.h"
 #else
 # include <calc/decl.h>
@@ -39,7 +39,7 @@
 /*
  * error buffer definitions
  */
-#define MAXERROR	512	/* maximum length of error message string */
+#define MAXERROR        512     /* maximum length of error message string */
 
 /*
  * calc math error control