Restore a first char in line in 1984/decot

One of the lines in the fix (which is the same code as the original) had
an extra space in front of the first char which showed a difference. Not
a big deal but fixes should modify as little as possible.

1984/decot/decot.c

@@ -6,7 +6,7 @@
 extern double floor(double);
 double (x1, y1) b;
 char x {sizeof(
-     double(%s,%D)(*)())
+    double(%s,%D)(*)())
 ,};
 struct tag{int x0,*xO;};