format_appendix: decrease width for file in coverage table

For bbi, the "o" in parsers/nmparser/parse_parameter_comments.go (44
characters) is partially truncated.  Decrease the width by one to
prevent this case, and, given these aren't fixed-width fonts, by one
more to hopefully provide enough margin to avoid this in other cases.

Author: kyleam

R/format-report.R

@@ -798,7 +798,7 @@ format_appendix <- function(extra_notes_data, return_vals = FALSE, scorecard_typ
     cov_results_df <- cov_results_df %>%
       dplyr::mutate(
         code_file = wrap_text(.data$code_file,
-          width = 45, indent = TRUE, strict = TRUE
+          width = 43, indent = TRUE, strict = TRUE
         ),
         test_coverage = sprintf("%.2f%%", .data$test_coverage)
       ) %>%