Original:

edit

test { test {\{ test, \test, \{,test\ \ \ {\

Using internal method to remove {:

edit
{{#invoke:Escape|main|mode=kill|test { test {\{ test, \test, \{,test\ \ \ {\|{}}

test test { test, test, {,test \

Using {{replace}} to remove {:

edit
{{#invoke:Escape|main|mode=undo|{{replace|{{#invoke:Escape|main|mode=text|test { test {\{ test, \test, \{,test\ \ \ {\}}|{|}}}}

test test { test, test, {,test \

No removal of { between escape/unescape (escape char not restored):

edit
{{#invoke:Escape|main|mode=undo
|{{#invoke:Escape|main|mode=text|test { test {\{ test, \test, \{,test\ \ \ {\}}
}}

test { test {{ test, test, {,test {\

Restore to original after escape

edit
{{#invoke:Escape|main|mode=undo
|{{#invoke:Escape|main|mode=text|test { test {\{ test, \test, \{,test\ \ \ {\}}
|\
}}

test { test {\{ test, \test, \{,test\ \ \ {\

Remove the word test if not escaped and then place a different escape char in the place of the old escape char (for use by something else):

edit

Note: The '%' char is a special in Lua, so use '%%' if that is the desired replacement. Otherwise, just a single char is fine (or a word).

{{#invoke:Escape|main|mode=kill
|test { test {\{ test, \test, \{,test\ \ \ {\
|test
|%%
}}

{ {%{ , %test, %{,% % % {\