Copy/Paste stripping broken in version > 0.13.x in QTConsole

[ghost]

This bug has kept me on 0.13.x for as long as I can remember. Every time
I decided to open a bug report I'd fire up QTconsole and make sure it
wasn't fixed in master already. And evertyime It was. And I would happily switch,
and in a day or so the bug always reappeard, and It seemed as if I was losing my mind.

Gladly, not so. Finally nailed it.

When Ipython is in the following state:

In [1]: """
   ...: just
   ...: some
   ...: foo
   ...: and bar
   ...: """

Marking the entire context with mouse and copying removes the leading
dots and let's you paste your code into your code editor. As it should.

In [2]: """
   ...: just
   ...: some
   ...: foo
   ...: and bar
   ...: """

That works too.

In [10]: """
   ...: just
   ...: some
   ...: foo
   ...: and bar
   ...: """

This only strips the prompt from the first line. See it?

Months. Literally Months to figure this out.

Related #3323, #3206

cc @takluyver

[takluyver]

The only difference being that the prompt has gone into double digits, right? That's rather bizarre, but I can reproduce it.

[takluyver]

Oh, I bet I've got it. The regex for the ...: continuation prompts has a fixed number of spaces, but it should be variable. Actually, both the number of spaces and the number of dots should be able to expand, because in the terminal we add extra dots instead of extra spaces.

Nice catch, by the way :-)

[ghost]

One more:

    ...:     clabels=zip(*df.columns.tolist())
    ...:     n_rlvls =df.index.nlevels
    ...:     n_clvls =df.columns.nlevels
    ...:     head=[]

If copy just the middle of a cell and paste it, the dots don't seem to get stripped.
These are seemingly silly things, but In practice my whole workflow depends on copying and pasting code
I work on in ipython iteratively.