Update cheatsheets

tldr/linux/sed

@@ -9,34 +9,34 @@ source: https://github.com/tldr-pages/tldr.git
 > See also: `awk`, `ed`.
 > More information: <https://www.gnu.org/software/sed/manual/sed.html>.
 
-- Replace "apple" with "mango" on all lines using basic `regex`, print to `stdout`:
+- [s]ubstitute all occurrences of "apple" with "mango" on all lines, print to `stdout`:
 
 `{{command}} | sed 's/apple/mango/g'`
 
-- Replace "apple" with "APPLE" on all lines using extended `regex`, print to `stdout`:
+- Replace "apple" with "mango" in-place in a file (overwriting original file):
 
-`{{command}} | sed {{[-E|--regexp-extended]}} 's/(apple)/\U\1/g'`
+`sed {{[-i|--in-place]}} 's/apple/mango/g' {{path/to/file}}`
 
-- Use basic `regex` to replace "apple" with "mango" and "orange" with "lime" in-place in a file (overwriting original file):
+- Run multiple substitutions in one command:
 
-`sed {{[-i|--in-place]}} -e 's/apple/mango/g' -e 's/orange/lime/g' {{path/to/file}}`
+`{{command}} | sed -e '{{s/apple/mango/g}}' -e '{{s/orange/lime/g}}'`
 
-- Execute a specific `sed` script file and print the result to `stdout`:
+- Use a custom delimiter (useful when the pattern contains slashes):
 
-`{{command}} | sed {{[-f|--file]}} {{path/to/script.sed}}`
-
-- [p]rint only the first line to `stdout`:
-
-`{{command}} | sed {{[-n|--quiet]}} '1p'`
+`{{command}} | sed '{{s#////#____#g}}'`
 
 - [d]elete lines 1 to 5 of a file and back up the original file with a `.orig` extension:
 
 `sed {{[-i|--in-place=]}}{{.orig}} '1,5d' {{path/to/file}}`
 
-- [i]nsert a new line at the beginning of a file, overwriting the original file in-place:
+- [p]rint only the first line to `stdout`:
+
+`{{command}} | sed {{[-n|--quiet]}} '1p'`
+
+- [i]nsert a new line at the beginning of a file, overwriting the original file:
 
 `sed {{[-i|--in-place]}} '1i\your new line text\' {{path/to/file}}`
 
-- Delete blank lines (with or without spaces/tabs) from a file, overwriting the original file in-place:
+- Delete blank lines (with or without spaces/tabs) from a file, overwriting the original file:
 
 `sed {{[-i|--in-place]}} '/^[[:space:]]*$/d' {{path/to/file}}`