Please describe the problem:
When certain characters ([, ], (, ), {, }, ;, :, ,, ., !, ?, ¡, ¿, /, ' ' (space) and — (em dash)) are repeated enough times to evoke a line break, the GtkTextView does not wrap them.

Although this functionality is beneficial in sane environments where the above characters are not expected to be repeated more than three times, applications that use GtkTextView in an environment where wrapping is preferred (Pidgin, IRC clients, etc.) have their windows either stretched—occasionally beyond the size of the screen—or a horizontal scrollbar appears, which then requires the user to scroll to read text.

Steps to reproduce:
1. Open up gedit, Pidgin or any other application that uses a GtkTextView for input.
2. Hold down the '[' key in the widget.

Actual results:
Rather than breaking the line, the GtkTextView expands horizontally.

Expected results:
When used in a typographical context, [](){};:,.!?¡¿/ — should be affected by wrapping the way regular characters are.

Does this happen every time?
Yes.

Other information:
The following is a PyGTK example that creates a window with a GtkTextView embedded in it to demonstrate.

#!/usr/bin/python

import gtk

window = gtk.Window()
window.set_default_size(80, 60)
window.connect('destroy', gtk.main_quit)
window.add(gtk.TextView())
window.child.set_wrap_mode(gtk.WRAP_CHAR)
window.show_all()

gtk.main()