add option to treat text with whitespace as a signle unit

[rickysarraf]

Description

Currently, we can do:

@ echo 'Ritesh Raj Sarraf'
Ritesh Raj Sarraf

⛢ 19:51:01 rrs@xps ~                                                                            
@ echo Ritesh                                                                                   

ॐ 19:51:23 rrs@xps ~                                                                            
@ echo Alt+F  'Ritesh                                                                                  

Above, items are broken down by space.

The above doesn't well fit in the use case below:

♅ 19:51:32 rrs@xps ~  
@ echo "abc" > "/tmp/Ritesh Raj Sarraf.txt"

⛢ 19:52:06 rrs@xps ~  
@ cat '/tmp/Ritesh Raj Sarraf.txt'
abc

♅ 19:52:17 rrs@xps ~  
@ cat ALT+F  '/tmp/Ritesh

It only gives broken down items. That isn't useful in the filename use case.

Below is what is stored in history.

 __xonsh__.history[-1]
HistoryEntry(cmd="ls '/tmp/Ritesh Raj Sarraf.txt'", out="'/tmp/Ritesh Raj Sarraf.txt'\n", rtn=0, ts=[1725546326.3570676, 1725546326.4170177], cwd='/home/rrs')

So I was wondering if we could have an option for output_search to not split on the basis of space. Maybe \n could be a split criteria ?