cloc: add --vcs example (#3707)

pages/common/cloc.md

@@ -5,12 +5,16 @@
 
 - Count all the lines of code in a directory:
 
-`cloc {{/path/to/directory}}`
+`cloc {{path/to/directory}}`
 
 - Count all the lines of code in a directory, displaying a progress bar during the counting process:
 
-`cloc --progress=1 {{/path/to/directory}}`
+`cloc --progress=1 {{path/to/directory}}`
 
 - Compare 2 directory structures and count the differences between them:
 
-`cloc --diff {{/directory/one}} {{/directory/two}}`
+`cloc --diff {{path/to/directory/one}} {{path/to/directory/two}}`
+
+- Ignore files that are ignored by VCS, such as files specified in .gitignore:
+
+`cloc --vcs git {{path/to/directory}}`