Merge pull request #14 from T3pp31/codex/revise-stdin-input-trimming-logic

stdin入力で末尾改行のみを除去し先頭/末尾スペースを保持する修正

Author: T3pp31

src/cli.rs

@@ -179,11 +179,15 @@ fn get_input_text(
                 )
                 .into());
             }
-            Ok(input.trim().to_string())
+            Ok(trim_trailing_newline(&input).to_string())
         }
     }
 }
 
+fn trim_trailing_newline(input: &str) -> &str {
+    input.trim_end_matches(['\n', '\r'])
+}
+
 /// Outputs the result to either a file or stdout
 ///
 /// This function handles outputting the cipher result to the specified destination.
@@ -396,6 +400,13 @@ mod tests {
             .contains("Cannot specify both text and file"));
     }
 
+    #[test]
+    fn test_trim_trailing_newline_preserves_leading_and_trailing_spaces() {
+        let input = "  keep spaces  \n";
+        let result = trim_trailing_newline(input);
+        assert_eq!(result, "  keep spaces  ");
+    }
+
     #[test]
     fn test_output_result_to_file() {
         let temp_file = NamedTempFile::new().unwrap();