While working on ideas to post-process the IntelliJ files created by idea.sh, I noticed that it adds the sources entries for modules as a single line (>1k chars long).
This could be added as one-line-per-entry very easily.

The change would be limited to just idea.sh itself:
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+# SOURCES is a single string containing embeded newlines.
 for root in $MODULE_ROOTS; do
     if [ "x$CYGPATH" != "x" ]; then
       root=`$CYGPATH -am $root`
     elif [ "x$WSL_DISTRO_NAME" != "x" ]; then
       root=`wslpath -am $root`
     fi
-
- SOURCES=$SOURCES" $SOURCE_PREFIX""$root""$SOURCE_POSTFIX"
+ # Add line termination/indentation for everything after the first entry.
+ if [ "x$SOURCES" != "x" ]; then
+ SOURCES="${SOURCES}\n "
+ fi
+ SOURCES="${SOURCES}${SOURCE_PREFIX}${root}${SOURCE_POSTFIX}"
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