fix: use platform-specific literal newlines

see rust-lang/rust#62865

Author: sbrugman

src/source_code/generator.rs

@@ -1102,7 +1102,7 @@ if True:
 if True:
     pass
 "#
-            .trim()
+            .trim().replace("\n", LineEnding::default().as_str())
         );
     }
 
@@ -1152,7 +1152,7 @@ if True:
             round_trip_with(
                 &Indentation::new("    ".to_string()),
                 &Quote::default(),
-                &LineEnding::default(),
+                &LineEnding::LF(),
                 r#"
 if True:
   pass
@@ -1163,13 +1163,13 @@ if True:
 if True:
     pass
 "#
-            .trim()
+            .trim().replace("\n", LineEnding::default().as_str())
         );
         assert_eq!(
             round_trip_with(
                 &Indentation::new("  ".to_string()),
                 &Quote::default(),
-                &LineEnding::default(),
+                &LineEnding::LF(),
                 r#"
 if True:
   pass
@@ -1180,7 +1180,7 @@ if True:
 if True:
   pass
 "#
-            .trim()
+            .trim().replace("\n", LineEnding::default().as_str())
         );
         assert_eq!(
             round_trip_with(
@@ -1197,7 +1197,7 @@ if True:
 if True:
 	pass
 "#
-            .trim()
+            .trim().replace("\n", LineEnding::default().as_str())
         );
     }