RFR: 8301197: Make sure use of printf is correct and actually needed

[David Holmes]

On Thu, 3 Apr 2025 21:08:40 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> make/autoconf/help.m4 line 295:
>> 
>>> 293:   $ECHO "* HS debug level: $HOTSPOT_DEBUG_LEVEL"
>>> 294:   $ECHO "* JVM variants:   $JVM_VARIANTS"
>>> 295:   $ECHO "* JVM features:   "
>> 
>> I believe this will now add a newline where there was none earlier, so the actual features will show up on a new line?
>
> Good catch; I'll fix that.

Again `echo -n`?

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PR Review Comment: https://git.openjdk.org/jdk/pull/24415#discussion_r2027995005