e2e-tests: Document how to handle eviction warning

As these current evictions should be safely ignored. Trying to override
the sole [warn]ing one, as below [1,2,3], did not succeed at removing
the said warning. The below Issue describes the context and that warning
further.

[1] https://www.scala-sbt.org/1.x/docs/Library-Management.html#Overriding+a+version

-Adding either one of these lines to build.sbt:
[2] dependencyOverrides += "org.scala-lang.modules" % "scala-java8-compat_2.12" % "0.8.0"
[3] dependencyOverrides += "org.scala-lang.modules" % "scala-java8-compat_2.12" % "0.9.0"

Bug: Issue 12280
Change-Id: I145709b2aa0837dbff0165062bc26e55aa44d4e2
diff --git a/Documentation/dev-e2e-tests.txt b/Documentation/dev-e2e-tests.txt
index 672981f..17334e3 100644
--- a/Documentation/dev-e2e-tests.txt
+++ b/Documentation/dev-e2e-tests.txt
@@ -54,6 +54,14 @@
 [warn] Credentials file ~/.sbt/sonatype_credentials does not exist
 ----
 
+The other warning below can be safely ignored, so far. Running the proposed `sbt evicted` command
+should only list `scala-java8-compat_2.12` as `[warn]`. The other dependency conflicts should show
+as `[info]`. All of the listed conflicts get usually resolved seamlessly or so.
+
+----
+[warn] There may be incompatibilities among your library dependencies; run 'evicted' to see detailed eviction warnings.
+----
+
 Every `sbt` command can include an optional log level
 link:https://www.scala-sbt.org/1.x/docs/Howto-Logging.html#Change+the+logging+level+globally[argument].
 Below, `[info]` logs are no longer shown: