[pango/fix-test-output] tests: Avoid locale dependency

[Matthias Clasen <matthiasc src gnome org>]

commit 757489cc0298846a0b398d135ff5de81d18ced3f
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jan 23 20:20:45 2021 -0500

    tests: Avoid locale dependency
    
    When producing output, use the C locale for formatting
    floating point numbers, to avoid locale dependent output.
    
    Fixes: #474

 tests/test-common.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/tests/test-common.c b/tests/test-common.c
index 60ecb7e1..514058cc 100644
--- a/tests/test-common.c
+++ b/tests/test-common.c
@@ -97,11 +97,11 @@ print_attribute (PangoAttribute *attr, GString *string)
   switch (attr->klass->type)
     {
     case PANGO_ATTR_LANGUAGE:
-      g_string_append_printf (string, "%s", pango_language_to_string (((PangoAttrLanguage *)attr)->value));
+      g_string_append (string, pango_language_to_string (((PangoAttrLanguage *)attr)->value));
       break;
     case PANGO_ATTR_FAMILY:
     case PANGO_ATTR_FONT_FEATURES:
-      g_string_append_printf (string, "%s", ((PangoAttrString *)attr)->value);
+      g_string_append (string, ((PangoAttrString *)attr)->value);
       break;
     case PANGO_ATTR_STYLE:
     case PANGO_ATTR_WEIGHT:
@@ -127,7 +127,7 @@ print_attribute (PangoAttribute *attr, GString *string)
     case PANGO_ATTR_FONT_DESC:
       {
         char *text = pango_font_description_to_string (((PangoAttrFontDesc *)attr)->desc);
-        g_string_append_printf (string, "%s", text);
+        g_string_append (string, text);
         g_free (text);
       }
       break;
@@ -138,7 +138,7 @@ print_attribute (PangoAttribute *attr, GString *string)
     case PANGO_ATTR_STRIKETHROUGH_COLOR:
       {
         char *text = pango_color_to_string (&((PangoAttrColor *)attr)->color);
-        g_string_append_printf (string, "%s", text);
+        g_string_append (string, text);
         g_free (text);
       }
       break;
@@ -146,7 +146,12 @@ print_attribute (PangoAttribute *attr, GString *string)
       g_string_append_printf (string, "shape");
       break;
     case PANGO_ATTR_SCALE:
-      g_string_append_printf (string,"%f", ((PangoAttrFloat *)attr)->value);
+      {
+        char val[20];
+
+        g_ascii_formatd (val, 20, "%f", ((PangoAttrFloat *)attr)->value);
+        g_string_append (string, val);
+      }
       break;
     default:
       g_assert_not_reached ();