src/content/en/: Unpluralize collection names

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+= Search in git
+:categories: git
+
+Here's a useful trio to know about to help you search things in git:
+
+. `git show <commit>`
+. `git log --grep='<regexp>'`
+. `git grep '<regexp>' [commit]`
+
+== 1. `git show <commit>`
+
+Show a specific commit and it's diff:
+
+[source,sh]
+----
+git show
+# shows the latest commit
+git show <commit>
+# shows an specific <commit>
+git show v1.2
+# shows commit tagged with v1.2
+----
+
+== 2. `git log --grep='<regexp>'`
+
+Search through the commit messages:
+
+[source,sh]
+----
+git log --grep='refactor'
+----
+
+== 3. `git grep '<regexp>' [commit]`
+
+:browse-article: link:../14/browse-git.html
+
+Search content in git history:
+
+[source,sh]
+----
+git grep 'TODO'
+# search the repository for the "TODO" string
+git grep 'TODO' $(git rev-list --all)
+# search the whole history for "TODO" string
+----
+
+And if you find an occurrence of the regexp in a specific commit and you want to
+browse the repository in that point in time, you can {browse-article}[use git
+checkout for that].