[BUG] Crash orbot when start

[Autolocsia]

To Reproduce
Steps to reproduce the behavior:

1. Go to 'orbot'
2. Click on 'click start'
3. See error

• Device: [xiaomi mi 8]
• OS: [e.g. Android 10]
• Version: [e.g. v17.4.1 Beta 3]

[syphyr]

You have entered custom bridges incorrectly. Remove the line with "#De" and also remove the "#" from the other lines.

[syphyr]

The custom bridges should have a syntax check added

[meenbeese]

The custom bridges should have a syntax check added

What is the correct syntax for custom bridges? As I'm not really familiar with their implementation, I can probably implement a syntax check using RegEx easily enough if you can guide me on how it should be done.

[syphyr]

The custom bridges should have a syntax check added

What is the correct syntax for custom bridges? As I'm not really familiar with their implementation, I can probably implement a syntax check using RegEx easily enough if you can guide me on how it should be done.

Here is the official webpage that offers obfs4 and webtunnel bridges: https://bridges.torproject.org/options
Its just a copy and paste from there.