(usage): Untabify.

src/ls.c

@@ -2349,7 +2349,7 @@ print_current_files (void)
       break;
     }
 }
- 
+
 /* Return the expected number of columns in a long-format time stamp,
    or zero if it cannot be calculated.  */
 
@@ -3252,7 +3252,7 @@ Sort entries alphabetically if none of -cftuSUX nor --sort.\n\
       --block-size=SIZE      use SIZE-byte blocks\n\
   -B, --ignore-backups       do not list implied entries ending with ~\n\
   -c                         with -lt: sort by, and show, ctime (time of last\n\
-				 modification of file status information)\n\
+                               modification of file status information)\n\
                                with -l: show ctime and sort by name\n\
                                otherwise: sort by ctime\n\
   -C                         list entries by columns\n\