*: fix typos reported by Hunspell (#5848)

Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com>
Co-authored-by: Seth Falco <seth@falco.fun>
Co-authored-by: Patrice Denis <patricedenis@users.noreply.github.com>

pages/common/perl.md

@@ -27,7 +27,7 @@
 
 `perl -p -i'.old' -e 's/{{find}}/{{replace}}/g' {{filename}}`
 
-- Run a multi-line find/replace expression on a file, and save the result in another file:
+- Run a multiline find/replace expression on a file, and save the result in another file:
 
 `perl -p0e 's/{{foo\nbar}}/{{foobar}}/g' {{input_file}} > {{output_file}}`