The BSP server didn't reset old diagnostic messages sent to BSP clients under
certain circumstances. This commit mitigates this edge case and ensures that
diagnostics for files that previously had compilation problems are properly
reset when fresh diagnostics messages are sent.
The culprit was a mismatch of map keys: Files with problems were sometimes recorded
under an absolute path, but later attempted to be retrieved by virtual path.
This follows on from #7470, to include all sources, not just managed and
unmanaged, in the source jar, along with all resources (previously only
unmanaged resources were included).
This means that if, for whatever crazy reason, someone does modify the
`sources` task to include additional sources or filter out sources, rather than
using the managed or unmanaged source mechanisms, their changes will still be
reflected in the source jar.
The old, hardcoded Scala 2.12 version previously used for the sbtn
project (as a kind of workaround?) was no longer supported by Scala IDE tooling.
But sbtn builds just fine when using the current global setting for the Scala 2.12
version, so this commit removes the hardcoded version.
sbt passes raw string messages in `ConsoleAppenderFromLog4J` to `StringFormatterMessageFactory`. This is wrong because these strings are pre-formatted and should not be processed again for formatting. There is no way to pass parameters to them anyway. This causes problems when the raw strings contain characters that `StringFormatterMessageFactory` wants to interpret.
For example, when using `-Ystatistics`:
```
ERROR StatusConsoleListener Unable to format msg: nscprofiling : 1 spans, ()7.543ms (0.3%)
java.util.UnknownFormatConversionException: Conversion = ')'
at java.base/java.util.Formatter.checkText(Formatter.java:2732)
at java.base/java.util.Formatter.parse(Formatter.java:2718)
at java.base/java.util.Formatter.format(Formatter.java:2655)
at java.base/java.util.Formatter.format(Formatter.java:2609)
at java.base/java.lang.String.format(String.java:2938)
at org.apache.logging.log4j.message.StringFormattedMessage.formatMessage(StringFormattedMessage.java:121)
at org.apache.logging.log4j.message.StringFormattedMessage.getFormattedMessage(StringFormattedMessage.java:89)
at sbt.internal.util.Appender.$anonfun$appendMessage$1(ConsoleAppender.scala:522)
...
```