Force the level of indention of tokens whose text matches a regular expression pattern to be a certain amount of spaces. The rule is only active for the first tokens on a line.
set_regex_indention(flattened_pd, pattern, target_indention = 0,
  comments_only = TRUE)A flattened parse table.
A character  with regular expressions to match against the token
in flattened_pd.
The desired level of indention of the tokens that
match pattern.
Boolean indicating whether only comments should be checked or all tokens.
A flattened parse table with indention set to target_indention for
the tokens that match regex.