nu-table: Strip custom color in the header when used on border (nushe…

…ll#10357)

ref: nushell#10351
cc: @fdncred

crates/nu-table/src/table.rs

@@ -2,6 +2,7 @@ use crate::table_theme::TableTheme;
 use nu_ansi_term::Style;
 use nu_color_config::TextStyle;
 use nu_protocol::TrimStrategy;
+use nu_utils::strip_ansi_unlikely;
 use std::cmp::min;
 use std::collections::HashMap;
 use tabled::{
@@ -285,13 +286,16 @@ fn set_border_head(table: &mut Table, with_footer: bool, wctrl: TableWidthCtrl)
         table.with(
             Settings::default()
                 .with(wctrl)
+                .with(StripColorFromRow(0))
+                .with(StripColorFromRow(count_rows - 1))
                 .with(HeaderMove((0, 0), true))
                 .with(HeaderMove((count_rows - 1 - 1, count_rows - 1), false)),
         );
     } else {
         table.with(
             Settings::default()
                 .with(wctrl)
+                .with(StripColorFromRow(0))
                 .with(HeaderMove((0, 0), true)),
         );
     }
@@ -968,3 +972,18 @@ fn colorize_lead_trail_space(
         }
     }
 }
+
+struct StripColorFromRow(usize);
+
+impl TableOption<NuRecords, CompleteDimensionVecRecords<'_>, ColoredConfig> for StripColorFromRow {
+    fn change(
+        self,
+        recs: &mut NuRecords,
+        _: &mut ColoredConfig,
+        _: &mut CompleteDimensionVecRecords<'_>,
+    ) {
+        for cell in &mut recs[self.0] {
+            *cell = CellInfo::new(strip_ansi_unlikely(cell.as_ref()).into_owned());
+        }
+    }
+}