:sig
function file_append(path : string, content : string) bool
function file_append(path : string, first : string, second : string) bool
function file_append(path : string, first : string, second : string, third : string) bool

:params
path : path of the file to update
content : text to append
first : first text value to append
second : second text value to append
third : third text value to append

:returns
`true` when Capy appends the text. Otherwise, it returns `false`.

:content
`file_append` adds text to the end of a file. Use `file_put_contents` to replace a file.

:example capy render
file_unlink("/tmp/doc-append.txt")
file_append("/tmp/doc-append.txt", "a", "b", "c")
print(file_get_contents("/tmp/doc-append.txt"), "\n")

:see-group
files
