file:/// links not clickable if the root dir has a underscore #865

Before opening an issue, please try starting terminator with an empty config
file, by issuing terminator -u -g /dev/null and see if it starts normally.

If it does, and you still want to open the bug, then please attach the
config file, usually found at $HOME/.config/terminator/config to the issue

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Describe the bug
For example file:///q/scratch/ is clickable, but file:///q_b/scratch/ is not.

To Reproduce
Steps to reproduce the behavior:
echo the above strings and try to ctrl+click them in terminator

Expected behavior
it opens in the browser

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS or Linux Distribution: Ubuntu
• Version: 20.04
• Display Technology: X11

Config file:

[global_config]
  enabled_plugins = LaunchpadBugURLHandler, LaunchpadCodeURLHandler, APTURLHandler, ActivityWatch, Logger
[keybindings]
  copy = <Primary>c
  paste = <Primary>v
[profiles]
  [[default]]
    cursor_color = "#aaaaaa"
    scrollback_lines = 20000
[layouts]
  [[default]]
    [[[window0]]]
      type = Window
      parent = ""
    [[[child1]]]
      type = Terminal
      parent = window0
[plugins]