Small style fixes.

Cargo.toml

@@ -20,5 +20,4 @@ regex = "0.1.41"
 
 [dev-dependencies]
 diff = "0.1.0"
-regex = "0.1"
 term = "0.2"

src/expr.rs

@@ -846,7 +846,7 @@ fn rewrite_string_lit(context: &RewriteContext,
                       width: usize,
                       offset: usize)
                       -> Option<String> {
-    if context.config.format_strings == false {
+    if !context.config.format_strings {
         return Some(context.snippet(span));
     }
 

src/string.rs

@@ -10,8 +10,6 @@
 
 // Format string literals.
 
-
-
 use unicode_segmentation::UnicodeSegmentation;
 use regex::Regex;
 
@@ -74,10 +72,11 @@ pub fn rewrite_string<'a>(s: &str, fmt: &StringFormat<'a>) -> String {
             cur_end += 1;
         }
         let raw_line = graphemes[cur_start..cur_end].join("");
-        let line: &str = if fmt.trim_end {
-            &(raw_line.trim())
+        let line = if fmt.trim_end {
+            raw_line.trim()
         } else {
-            &raw_line
+            // TODO: use as_str once it's stable.
+            &*raw_line
         };
 
         result.push_str(line);