From 24f4b151b11b22b66ac0128f76c1e12cca45b178 Mon Sep 17 00:00:00 2001
From: Niko Matsakis <niko@alum.mit.edu>
Date: Tue, 26 Apr 2016 13:36:30 -0400
Subject: [PATCH] Nit: use last_mut better

---
 src/libsyntax/errors/snippet/mod.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/libsyntax/errors/snippet/mod.rs b/src/libsyntax/errors/snippet/mod.rs
index ada336b29a4..0c8b4f2046a 100644
--- a/src/libsyntax/errors/snippet/mod.rs
+++ b/src/libsyntax/errors/snippet/mod.rs
@@ -229,10 +229,9 @@ impl<S1,S2> From<(S1, Style, S2, Style, RenderedLineKind)> for RenderedLine
 
 impl RenderedLine {
     fn trim_last(&mut self) {
-        if !self.text.is_empty() {
-            let last_text = &mut self.text.last_mut().unwrap().text;
-            let len = last_text.trim_right().len();
-            last_text.truncate(len);
+        if let Some(last_text) = self.text.last_mut() {
+            let len = last_text.text.trim_right().len();
+            last_text.text.truncate(len);
         }
     }
 }