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-rw-r--r--exercises/09_strings/strings3.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/exercises/09_strings/strings3.rs b/exercises/09_strings/strings3.rs
index dedc081..d53f654 100644
--- a/exercises/09_strings/strings3.rs
+++ b/exercises/09_strings/strings3.rs
@@ -18,6 +18,10 @@ fn replace_me(input: &str) -> String {
???
}
+fn main() {
+ // You can optionally experiment here.
+}
+
#[cfg(test)]
mod tests {
use super::*;