document/explain logic of ignoring --lines

as seen in #942 and #1000 (and others) use of `--lines` does not reliably work.

I'm trying to grok how/why....

As an example:

```hello.java
///usr/bin/env jbang "$0" "$@" ; exit $?

import static java.lang.System.*;

public class hello {

public static void main(String... args) {
out.println("Hello World");
}
}
```

I want google java format to ignore the first line - reading other isseues I should --skip-* as much as possible ...

`jbang com.google.googlejavaformat:google-java-format:1.28.0 --lines 2:9999 --skip-javadoc-formatting --skip-reflowing-long-strings --skip-sorting-imports --skip-removing-unused-imports hello.java`

result in first line being formatted as: `/// usr/bin/env jbang "$0" "$@" ; exit $?`

why ?

If I add `--lines 1000:9999` it works...but now the code is not formatted at all.

is this really the intended behavior of --lines ?

any way to have it not try include outside the lines requested?

Reproduce the issue with the supplied hello.java example and the two google-java-format commands. Trace the --lines option's range handling, then document why the first line is formatted and what behavior is intended, including whether a focused-line formatting result can be achieved.

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