I am running the termux version 0.117
When I execute a command, the trailing whitespace before the current cursor, if and only if it was written as the last character.

For instance (I use the ¦ for cursor position in the following examples):

Let's get the following command example: (I use the ¦ char as the cursor pointer)

I got the following command to modify

mix my_task

So I go after mix and type help to result to the following command

mix help ¦my_task

And termux tries to execute

mix helpmy_task

Should I create an issue for this?