[haskeline] #78: control characters in prompt mess up width calculations

[haskeline]

#78: control characters in prompt mess up width calculations
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Reporter:  judah   |        Owner:     
    Type:  defect  |       Status:  new
Priority:  minor   |    Milestone:     
 Version:  0.6     |   Resolution:     
Keywords:          |  
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Comment (by judah):

 In general, any escape sequence for bold or color should have zero length
 in the terminal.

 In bash, to signify that a control sequence in the prompt has zero width
 you surround it with `\[` and `\]`.  In readline itself, you surround it
 with `\001` and `\002`.  Maybe it would be easiest for Haskeline to do
 something similar?

-- 
Ticket URL: <http://trac.haskell.org/haskeline/ticket/78#comment:2>
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