From bc673bc9433b7d9c7e669d45620dd9d36b5558d5 Mon Sep 17 00:00:00 2001
From: Dongdong Tian <seisman.info@gmail.com>
Date: Thu, 25 Apr 2024 08:21:38 +0800
Subject: [PATCH] non_ascii_to_octal: Return the input string if it only
 contains printable ASCII characters (#3199)

---
 pygmt/helpers/utils.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pygmt/helpers/utils.py b/pygmt/helpers/utils.py
index 66be427d937..781e0e4533f 100644
--- a/pygmt/helpers/utils.py
+++ b/pygmt/helpers/utils.py
@@ -233,6 +233,10 @@ def non_ascii_to_octal(argstr):
     >>> non_ascii_to_octal("ABC ±120° DEF α ♥")
     'ABC \\261120\\260 DEF @~\\141@~ @%34%\\252@%%'
     """  # noqa: RUF002
+    # Return the string if it only contains printable ASCII characters from 32 to 126.
+    if all(32 <= ord(c) <= 126 for c in argstr):
+        return argstr
+
     # Dictionary mapping non-ASCII characters to octal codes
     mapping = {}