pr: exit with code 1 if --column argument is zero

src/uu/pr/src/pr.rs

@@ -778,6 +778,11 @@ fn build_options(
     // --column has more priority than -column
 
     let column_option_value = match parse_usize(matches, options::COLUMN) {
+        Some(Ok(0)) => {
+            return Err(PrError::EncounteredErrors {
+                msg: "invalid -column argument '0'".to_string(),
+            });
+        }
         Some(res) => Some(res?),
         None => start_column_option,
     };

tests/by-util/test_pr.rs

@@ -873,3 +873,11 @@ fn test_expand_tab_does_not_consume_next_argument() {
     new_ucmd!().args(&["-ea", test_file_path]).succeeds();
     new_ucmd!().args(&["-ea1", test_file_path]).succeeds();
 }
+
+#[test]
+fn test_zero_columns() {
+    new_ucmd!()
+        .arg("--column=0")
+        .fails_with_code(1)
+        .stderr_contains("pr: invalid -column argument '0'");
+}