refactor(cli::printing): use Option<Color> for blockfmt_advanced

Users might just need the cell String, not a colored one.

members/libpt-cli/src/printing.rs

@@ -42,10 +42,10 @@ pub fn blockprint(content: impl ToString, color: Color) {
 pub fn blockfmt(content: impl ToString, color: Color) -> String {
     blockfmt_advanced(
         content,
-        color,
+        Some(color),
         presets::UTF8_BORDERS_ONLY,
         ContentArrangement::DynamicFullWidth,
-        CellAlignment::Center
+        CellAlignment::Center,
     )
 }
 
@@ -67,7 +67,7 @@ pub fn blockfmt(content: impl ToString, color: Color) -> String {
 ///     "{}",
 ///     blockfmt_advanced(
 ///         "Hello world!".to_string(),
-///         Color::Blue,
+///         Some(Color::Blue),
 ///         presets::UTF8_FULL,
 ///         ContentArrangement::DynamicFullWidth,
 ///         CellAlignment::Center
@@ -86,20 +86,20 @@ pub fn blockfmt(content: impl ToString, color: Color) -> String {
 ///
 pub fn blockfmt_advanced(
     content: impl ToString,
-    color: Color,
+    color: Option<Color>,
     preset: &str,
     arrangement: ContentArrangement,
-    alignment: CellAlignment
+    alignment: CellAlignment,
 ) -> String {
     let mut table = Table::new();
     table
         .load_preset(preset)
         .set_content_arrangement(arrangement)
         .add_row(vec![content.to_string()]);
-    table
-        .column_mut(0)
-        .unwrap()
-        .set_cell_alignment(alignment);
+    table.column_mut(0).unwrap().set_cell_alignment(alignment);
 
-    format!("{}", style(table).fg(color))
+    match color {
+        Some(c) => format!("{}", style(table).fg(c)),
+        None => table.to_string(),
+    }
 }