Bounty: 50
I would like to create a macro command that would put everything inside brackets for example or any other character, till the end of a line or till the end of a group {inchar ...}. Something like a custom bfseries command. Using default commands or xparse. It is interesting to see several implementation if possible.
That is, such an inputs should produce corresponding outputs
text text inchar() text text text text
some other text on a new line
↓
text text (text text text text)
some other text on a new line
text text inchar|] text text text text\
some other text on a new line
↓
text text |text text text text]
some other text on a new line
text text inchar{} text text text textpar
some other text on a new line
↓
text text {text text text text}
some other text on a new line
Also it should work in amsmath environments
begin{multline*}
abc\
inchar() def\
ghi inchar{} jkl + mno
end{multline*}
↓
abc
(def)
ghi {jkl + mno}