message: Add docs for TextRow getters
diff: @@ -145,7 +145,14 @@ impl<'a> TextRow<'a> {
  self.columns
  }
  - /// stub
  + /// Retrieve the contents of a field of a row
  + ///
  + /// A field can be accessed by the name or index of its column, though
  + /// access by index is more efficient. Rows are 0-indexed.
  + ///
  + /// # Panics
  + ///
  + /// Panics if the index does not reference a column
  pub fn get<I>(&self, idx: I) -> &str
  where
  I: RowIndex + fmt::Debug,
  @@ -157,7 +164,14 @@ impl<'a> TextRow<'a> {
  }
  }
  - /// stub
  + /// Retrieves the contents of a field of the row.
  + ///
  + /// A field can be accessed by the name or index of its column, though
  + /// access by index is more efficient. Rows are 0-indexed.
  + ///
  + /// Returns None if the index does not reference a column, Some(Err(..)) if
  + /// there was an error parsing the result as UTF-8, and Some(Ok(..)) on
  + /// success.
  pub fn get_opt<I>(&self, idx: I) -> Option<Result<&str>>
  where
  I: RowIndex,
  