ptx: use translate! macro for regex error messages

Author: CrazyRoka

src/uu/ptx/locales/en-US.ftl

@@ -28,3 +28,4 @@ ptx-error-dumb-format = There is no dumb format with GNU extensions disabled
 ptx-error-not-implemented = { $feature } not implemented yet
 ptx-error-write-failed = write failed
 ptx-error-extra-operand = extra operand { $operand }
+ptx-invalid-regular-expression = invalid regular expression: { $error }

src/uu/ptx/src/ptx.rs

@@ -307,9 +307,9 @@ fn create_word_set(
     file_map: &FileMap,
 ) -> UResult<BTreeSet<WordRef>> {
     let reg = Regex::new(&filter.word_regex)
-        .map_err(|e| USimpleError::new(1, format!("invalid regular expression: {}", e)))?;
+        .map_err(|e| USimpleError::new(1, translate!("ptx-invalid-regular-expression", "error" => e)))?;
     let ref_reg = Regex::new(&config.context_regex)
-        .map_err(|e| USimpleError::new(1, format!("invalid regular expression: {}", e)))?;
+        .map_err(|e| USimpleError::new(1, translate!("ptx-invalid-regular-expression", "error" => e)))?;
     let mut word_set: BTreeSet<WordRef> = BTreeSet::new();
     for (file, lines) in file_map {
         let mut count: usize = 0;