The InMemoryDiffEntry defaults diffs with UTF-8 encoding when a file could be in another encoding e.g. ISO-8859

[natedanner]

How are you running OpenRewrite?

Running through the Moderne SaaS.

Charset hardcoded to UTF_8:

rewrite/rewrite-core/src/main/java/org/openrewrite/internal/InMemoryDiffEntry.java

Lines 65 to 77 in d304dc8

	this.oldId = inserter.insert(Constants.OBJ_BLOB, oldSource.getBytes(StandardCharsets.UTF_8)).abbreviate(40);
	this.oldMode = oldMode;
	this.oldPath = (relativeTo == null ? originalFilePath : relativeTo.relativize(originalFilePath)).toString().replace("\\", "/");
	} else {
	this.oldId = A_ZERO;
	this.oldMode = FileMode.MISSING;
	this.oldPath = DEV_NULL;
	}
	if (filePath != null) {
	this.newId = inserter.insert(Constants.OBJ_BLOB, newSource.getBytes(StandardCharsets.UTF_8)).abbreviate(40);
	this.newMode = newMode;
	this.newPath = (relativeTo == null ? filePath : relativeTo.relativize(filePath)).toString().replace("\\", "/");

Is your project public? If so, can you share a link to it?
https://github.com/openrewrite/rewrite-kubernetes

What is the smallest, simplest way to reproduce the problem?

Related to: https://github.com/moderneinc/moderne-scm/issues/724

Diff this file that is in ISO-8859
openrewrite/rewrite-kubernetes@4ea7936
against the latest https://github.com/openrewrite/rewrite-kubernetes/blob/main/gradlew

This section in particular

  * functions;
#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
#         * compound commands having a testable exit status, especially «case»;
#         * various built-in commands including «command», «set», and «ulimit».

What did you expect to see?

Expected to see a diff based on encoding differences but the dif is empty
e.g.

What did you see instead?

No diff.