Summary: Read file with caching

Description:
The LineCache module allows one to get any line from any file, caching
the lines and file information on first access to the file. Although
the file may be any file, the common use is when the file is a Ruby
script since parsing of the file is done to figure out where the
statement boundaries are.

The routines here may be is useful when a small random sets of lines
are read from a single file, in particular in a debugger to show
source lines.

Maintainer: nobody