http://crucible.labs.intellij.net/cru/CR-IC-4539#c24372

these methods are good candidates to move them to com.intellij.util.DocumentUtil
(cherry picked from commit 8998f5e)
WEB-11133 JS Debugger: Variables view is not properly updated after setting value
(cherry picked from commit edcd1ec)
ability to disable debugger value lookup
(cherry picked from commit d640d90)
breakpoints must not be rendered in diff editor
(cherry picked from commit 46dc44c)