# Regular expression examples
. | Matches all characters
+ | Matches the previous expression one or more times
* | Matches the previous expression zero or more times
\ | Escapes special characters
\Q...\E | Matches the characters between `\Q` and `\E` literally, suppressing the meaning of special characters.
[a-c] | Matches a, b and c
\d | Matches all digits
\w | Matches all word characters
\s | Matches all whitespace characters
^ | Matches the start of a line
$ | Matches the end of a line
$1..$9 | groups are referenced in the replace expression by `$i` for the i-th group
${count08} | replaced with numbers starting from 1, incrementing by 1 for every match. The numbers after "count" are optional and indicate how many leading spaces the output should use, or if the number is preceded by a zero how many leading zeros.
${count08(start)} | same as `${count}`, but with "start" as the start value for counting
${count08(start, increment)} | same as `${count(start)}`, but with "increment" as the increment value instead of the default 1
${filepath} | replaced with the path of the currently searched file
${filename} | replaced with the name of the currently searched file. The name does not include the file extension
${fileext} | replaced with the path of the currently searched file