prawnpdf/prawn — pull request #687 by mogest (2014-03-05 20:22:46+00:00)
Title: Update Prawn::Images#image method documentation to be more precise

Looks like some time between 0.12.0 and 0.15.0 the requirement for this object went from only responding to #read to also needing to respond to #rewind. Now, if it doesn't respond to #rewind, it tries to treat it as a path and complains that it's not a string.

My pull request simply adds to the documentation that an object also needs to respond to #rewind now.