Fix TerminalMode::write_str() to write all chars (#228)

Author: Thomas Kilian

CHANGELOG.md

@@ -6,6 +6,9 @@ SSD1306 monochrome OLED display.
 <!-- next-header -->
 
 ## [Unreleased] - ReleaseDate
+### Fixed
+- Fix TerminalMode::write_str() to write all chars ([#228](https://github.com/rust-embedded-community/ssd1306/issues/228))
+
 ## [0.10.0] - 2025-03-22
 ### Changed
 - Added `DisplaySize64x32` to the prelude

src/mode/terminal.rs

@@ -624,7 +624,8 @@ where
     SIZE: TerminalDisplaySize,
 {
     fn write_str(&mut self, s: &str) -> Result<(), fmt::Error> {
-        s.chars().map(move |c| self.print_char(c)).next_back();
-        Ok(())
+        s.chars()
+            .try_for_each(|c| self.print_char(c))
+            .map_err(|_| fmt::Error)
     }
 }