grep: update page (#12901)

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

pages/common/grep.md

@@ -9,15 +9,15 @@
 
 - Search for an exact string (disables regular expressions):
 
-`grep --fixed-strings "{{exact_string}}" {{path/to/file}}`
+`grep {{-F|--fixed-strings}} "{{exact_string}}" {{path/to/file}}`
 
 - Search for a pattern in all files recursively in a directory, showing line numbers of matches, ignoring binary files:
 
-`grep --recursive --line-number --binary-files {{without-match}} "{{search_pattern}}" {{path/to/directory}}`
+`grep {{-r|--recursive}} {{-n|--line-number}} --binary-files {{without-match}} "{{search_pattern}}" {{path/to/directory}}`
 
 - Use extended regular expressions (supports `?`, `+`, `{}`, `()` and `|`), in case-insensitive mode:
 
-`grep --extended-regexp --ignore-case "{{search_pattern}}" {{path/to/file}}`
+`grep {{-E|--extended-regexp}} {{-i|--ignore-case}} "{{search_pattern}}" {{path/to/file}}`
 
 - Print 3 lines of context around, before, or after each match:
 
@@ -25,12 +25,12 @@
 
 - Print file name and line number for each match with color output:
 
-`grep --with-filename --line-number --color=always "{{search_pattern}}" {{path/to/file}}`
+`grep {{-H|--with-filename}} {{-n|--line-number}} --color=always "{{search_pattern}}" {{path/to/file}}`
 
 - Search for lines matching a pattern, printing only the matched text:
 
-`grep --only-matching "{{search_pattern}}" {{path/to/file}}`
+`grep {{-o|--only-matching}} "{{search_pattern}}" {{path/to/file}}`
 
 - Search `stdin` for lines that do not match a pattern:
 
-`cat {{path/to/file}} | grep --invert-match "{{search_pattern}}"`
+`cat {{path/to/file}} | grep {{-v|--invert-match}} "{{search_pattern}}"`