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-rw-r--r--src/libgetopts/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libgetopts/lib.rs b/src/libgetopts/lib.rs
index a182f582b5f..74165dcabc4 100644
--- a/src/libgetopts/lib.rs
+++ b/src/libgetopts/lib.rs
@@ -710,7 +710,7 @@ pub fn usage(brief: &str, opts: &[OptGroup]) -> String {
 
     let desc_sep = format!("\n{}", " ".repeat(24));
 
-    let mut rows = opts.iter().map(|optref| {
+    let rows = opts.iter().map(|optref| {
         let OptGroup{short_name,
                      long_name,
                      hint,