Remove space when no file has extended attributes

There would be an extra column, and it looked unsightly. Unsightly!

This also removes the last specific style from the details view (Plain).

src/output/details.rs

@@ -10,7 +10,6 @@ use users::{OSUsers, Users};
 use super::filename;
 
 use ansi_term::{ANSIString, ANSIStrings, Style};
-use ansi_term::Style::Plain;
 
 use locale;
 
@@ -213,9 +212,9 @@ impl Table {
         };
 
         let x_colour = if let f::Type::File = permissions.file_type { c.user_execute_file }
-                                                            else { c.user_execute_other };
+                                                               else { c.user_execute_other };
 
-        let string = ANSIStrings( &[
+        let mut columns = vec![
             file_type,
             bit(permissions.user_read,     "r", c.user_read),
             bit(permissions.user_write,    "w", c.user_write),
@@ -226,12 +225,15 @@ impl Table {
             bit(permissions.other_read,    "r", c.other_read),
             bit(permissions.other_write,   "w", c.other_write),
             bit(permissions.other_execute, "x", c.other_execute),
-            if permissions.attribute { c.attribute.paint("@") } else { Plain.paint(" ") },
-        ]).to_string();
+        ];
+
+        if permissions.attribute {
+            columns.push(c.attribute.paint("@"));
+        }
 
         Cell {
-            text: string,
-            length: 11,
+            text: ANSIStrings(&columns).to_string(),
+            length: columns.len(),
         }
     }