grex: add example (#19459)

* grex: add example

* Update grex command examples for clarity

* Update grex.md

Co-authored-by: Managor <[email protected]>

* Update grex.md

* Update pages/common/grex.md

---------

Co-authored-by: Sebastiaan Speck <[email protected]>
Co-authored-by: Managor <[email protected]>
Co-authored-by: Sahil Afrid Farookhi <[email protected]>

Author: 4 people

pages/common/grex.md

@@ -5,24 +5,32 @@
 
 - Generate a simple `regex`:
 
-`grex {{space_separated_strings}}`
+`grex {{string1 string2 ...}}`
 
 - Generate a case-insensitive `regex`:
 
-`grex {{[-i|--ignore-case]}} {{space_separated_strings}}`
+`grex {{[-i|--ignore-case]}} {{string1 string2 ...}}`
 
-- Replace digits with '\d':
+- Replace digits with `\d`:
 
-`grex {{[-d|--digits]}} {{space_separated_strings}}`
+`grex {{[-d|--digits]}} {{string1 string2 ...}}`
 
-- Replace Unicode word character with '\w':
+- Replace Unicode word character with `\w`:
 
-`grex {{[-w|--words]}} {{space_separated_strings}}`
+`grex {{[-w|--words]}} {{string1 string2 ...}}`
 
-- Replace spaces with '\s':
+- Replace spaces with `\s`:
 
-`grex {{[-s|--spaces]}} {{space_separated_strings}}`
+`grex {{[-s|--spaces]}} {{string1 string2 ...}}`
 
-- Add {min, max} quantifier representation for repeating sub-strings:
+- Detect repeating patterns in the input and shorten them using {min,max} quantifiers:
 
-`grex {{[-r|--repetitions]}} {{space_separated_strings}}`
+`grex {{[-r|--repetitions]}} {{string1 string2 ...}}`
+
+- Generate `regex` of test cases (separated by newline) from a file:
+
+`grex {{[-f|--file]}} {{path/to/file}}`
+
+- Do not generate anchors and non-capture groups:
+
+`grex --no-anchors {{[-g|--capture-groups]}} {{string1 string2 ...}}`