pw_sys_io: Fix trailing newline to be \r\n

Change-Id: I8a8a3ddd76cdae1b05f07299d60d5bc18405e5b6
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/13361
Reviewed-by: Armando Montanez <amontanez@google.com>
Commit-Queue: Ian Tessier <itessier@google.com>
diff --git a/pw_sys_io_baremetal_lm3s6965evb/sys_io_baremetal.cc b/pw_sys_io_baremetal_lm3s6965evb/sys_io_baremetal.cc
index 29fed33..9794510 100644
--- a/pw_sys_io_baremetal_lm3s6965evb/sys_io_baremetal.cc
+++ b/pw_sys_io_baremetal_lm3s6965evb/sys_io_baremetal.cc
@@ -175,8 +175,8 @@
   }
   chars_written += result.size();
 
-  // Write trailing newline ("\n\r").
-  result = WriteBytes(std::as_bytes(std::span("\n\r", 2)));
+  // Write trailing newline.
+  result = WriteBytes(std::as_bytes(std::span("\r\n", 2)));
   chars_written += result.size();
 
   return StatusWithSize(result.status(), chars_written);
diff --git a/pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc b/pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc
index 9145931..3f0444b 100644
--- a/pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc
+++ b/pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc
@@ -240,8 +240,8 @@
   }
   chars_written += result.size();
 
-  // Write trailing newline ("\n\r").
-  result = WriteBytes(std::as_bytes(std::span("\n\r", 2)));
+  // Write trailing newline.
+  result = WriteBytes(std::as_bytes(std::span("\r\n", 2)));
   chars_written += result.size();
 
   return StatusWithSize(result.status(), chars_written);