hg: kulla/dev/langtools: Per JShellTool review, streamify saveFile(). Thanks Remi.

[robert.field at oracle.com]

Changeset: f2e1744c62d0
Author:    rfield
Date:      2015-09-08 13:18 -0700
URL:       http://hg.openjdk.java.net/kulla/dev/langtools/rev/f2e1744c62d0

Per JShellTool review, streamify saveFile().  Thanks Remi.

! src/jdk.jshell/share/classes/jdk/internal/jshell/tool/ExternalEditor.java