spark git commit: [SPARK-25906][SHELL] Documents '-I' option (from Scala REPL) in spark-shell

Repository: spark Updated Branches: refs/heads/branch-2.4 8526f2ee5 -> f98c0ad02 [SPARK-25906][SHELL] Documents '-I' option (from Scala REPL) in spark-shell ## What changes were proposed in this pull request? This PR targets to document `-I` option from Spark 2.4.x (previously `-i` option

spark git commit: [SPARK-25906][SHELL] Documents '-I' option (from Scala REPL) in spark-shell

Repository: spark Updated Branches: refs/heads/master 78fa1be29 -> cc38abc27 [SPARK-25906][SHELL] Documents '-I' option (from Scala REPL) in spark-shell ## What changes were proposed in this pull request? This PR targets to document `-I` option from Spark 2.4.x (previously `-i` option until