GHCi: Fill field `DynFlags.dumpPrefix`. (Fixes #17500)
For interactive evaluations set the field DynFlags.dumpPrefix
to the
GHCi internal module name. The GHCi module name for an interactive
evaluation is something like Ghci9
.
To avoid user confusion, don't dump any data for GHCi internal evaluations.
Extend the comment for DynFlags.dumpPrefix
and fix a little typo in a
comment about the GHCi internal module names.