GoIdentifierFrom provides a mechanism to mutate an arbitrary descriptive string (name) into a Go identifier (variable name, function name, etc) that e.g.

Returns the indefinite article (in English) for a the given noun, which is 'an' for nouns beginning with a vowel, otherwise 'a'.

Indent indents a block of text with an indent string.

Returns a string of the same length, filled with "*"s.

Underline returns the provided text together with a new line character and a line of "=" characters whose length is equal to the maximum line length in the provided text, followed by a final newline character.