Fix deprecation warnings

src/basename/basename.rs

@@ -92,7 +92,7 @@ fn strip_dir(fullname: &str) -> String {
         if c == '/' || c == '\\' {
             break;
         }
-        name.push_char(c);
+        name.push(c);
     }
 
     name.as_slice().chars().rev().collect()

src/comm/comm.rs

@@ -40,7 +40,7 @@ fn mkdelim(col: uint, opts: &getopts::Matches) -> String {
 fn ensure_nl(line: String) -> String {
     match line.as_slice().chars().last() {
         Some('\n') => line,
-        _ => line.append("\n"),
+        _ => line + "\n",
     }
 }
 

src/fold/fold.rs

@@ -201,7 +201,7 @@ fn fold_file<T: io::Reader>(file: BufferedReader<T>, bytes: bool, spaces: bool,
                     }
                     _ => count += 1
                 };
-                output.push_char(ch);
+                output.push(ch);
             }
             if count > 0 {
                 print!("{}", output);

src/nl/nl.rs

@@ -179,7 +179,7 @@ fn nl<T: Reader> (reader: &mut BufferedReader<T>, settings: &Settings) {
     for mut l in reader.lines().map(|r| r.unwrap()) {
         // Sanitize the string. We want to print the newline ourselves.
         if l.as_slice().chars().rev().next().unwrap() == '\n' {
-            l.pop_char();
+            l.pop();
         }
         // Next we iterate through the individual chars to see if this
         // is one of the special lines starting a new "section" in the

src/shuf/shuf.rs

@@ -141,7 +141,7 @@ fn shuf(input: Vec<String>, mode: Mode, repeat: bool, zero: bool, count: uint, o
                 let mut lines = vec!();
                 for line in file.lines() {
                     let mut line = crash_if_err!(1, line);
-                    line.pop_char();
+                    line.pop();
                     lines.push(line);
                 }
                 lines.into_iter()

src/split/split.rs

@@ -196,7 +196,7 @@ fn str_prefix(i: uint, width: uint) -> String {
         let div = num::pow(26 as uint, w);
         let r = n / div;
         n -= r * div;
-        c.push_char(char::from_u32((r as u32) + 97).unwrap());
+        c.push(char::from_u32((r as u32) + 97).unwrap());
     }
     c
 }
@@ -211,7 +211,7 @@ fn num_prefix(i: uint, width: uint) -> String {
         let div = num::pow(10 as uint, w);
         let r = n / div;
         n -= r * div;
-        c.push_char(char::from_digit(r, 10).unwrap());
+        c.push(char::from_digit(r, 10).unwrap());
     }
     c
 }