help_create_break: create a break sequence
In XiaoliangJiang/IndependentStudy2017YW: Structure and abstract your code

the idea of the helper function is to return a string of a line length that is composed of the start character and the break_characters

1 2	help_create_break(start = "##", sep = " ", break_char = "-", length = options()$strcode$char_length, anchor_in_sep = FALSE)

`start`	A sequence of letters to start the sequence.
`sep`	A separator sequence to separate start and break_char.
`break_char`	A character (sequence) used to create the actual break.
`length`	An integer value indicating how long the sequence should be.
`anchor_in_sep`	whether or not a code anchor (that is, a hash) should be inserted in the center of the separator.