Add Single Key Presses in Interactive Mode as a git til.

git/single-key-presses-in-interactive-mode.md

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+# Single Key Presses in Interactive Mode
+
+When staging changes in interactive mode (`git add -p`), you have a number
+of options associated with single keys. `y` is *yes*, `n` is *no*, `a` is
+*this and all remaining*, and so on.
+
+By default, you have to press *enter* after making your selection. However,
+it can be configured for single key presses. Add the following to your git
+configuration file to enable single key presses for interactive mode:
+
+```
+[interactive]
+    singlekey = true
+```
+
+[source](https://github.com/hashrocket/dotmatrix/blob/master/.gitconfig#L33-L34)