git-commit, rubocop: use grouped parameters (#13636)

Followup to the https://github.com/tldr-pages/tldr/pulls/13609 to update `git-commit` and `rubocop` pages for English translation/

pages/common/git-commit.md

@@ -25,7 +25,7 @@
 
 - Commit only specific (already staged) files:
 
-`git commit {{path/to/file1}} {{path/to/file2}}`
+`git commit {{path/to/file1 path/to/file2 ...}}`
 
 - Create a commit, even if there are no staged files:
 

pages/common/rubocop.md

@@ -9,7 +9,7 @@
 
 - Check one or more specific files or directories:
 
-`rubocop {{path/to/file}} {{path/to/directory}}`
+`rubocop {{path/to/file_or_directory1 path/to/file_or_directory2 ...}}`
 
 - Write output to file:
 
@@ -21,11 +21,11 @@
 
 - Exclude a cop:
 
-`rubocop --except {{cop_1}} {{cop_2}}`
+`rubocop --except {{cop1 cop2 ...}}`
 
 - Run only specified cops:
 
-`rubocop --only {{cop_1}} {{cop_2}}`
+`rubocop --only {{cop1 cop2 ...}}`
 
 - Auto-correct files (experimental):