gistfile1.txt

file = File.new("testfile.txt", "r")

file.pos
=> 0

file.gets
=> "This is line one\n"

file.pos
=> 18

#This reports 18, but there are clearly 17 characters in that line.
# In fact, if you capture the gets to a variable, it reports its length correctly

file.rewind
=> 0
a = file.gets
=> "This is line one\n"
a.length
=> 17
file.pos
=> 18

# Is this expected behavior?
# I'm running ruby 2.0.0p247 (2013-06-27) [i386-mingw32]
# on Win7 64bit if that helps