Removing trailing & leading spaces on a multiline string

[visual cliff]

regex ?

https://github.com/rwtodd/Go.Sed found this that could suit your need if you know how sed works in cmd line

[modest lintel]

Id scan each line, use strings.TrimSpace

and put them in another buffer as an output

[severe delta]

bufio: Scanner

type Scanner struct {
    // contains filtered or unexported fields
}

Scanner provides a convenient interface for reading data such as a file of newline-delimited lines of text. Successive calls to the Scan method will step through the 'tokens' of a file, skipping the bytes between the tokens. The specification of a token is defined by a split function of type SplitFunc; the default split function breaks the input into lines with line termination stripped. Split functions are defined in this package for scanning a file into lines, bytes, UTF-8-encoded runes, and space-delimited words. The client may instead provide a custom split function....

More documentation omitted