How to do stuff with git
+Staging a subset of changes in a file
+-------------------------------------
+
+ git add -p
+
+ y - stage this hunk
+ n - do not stage this hunk
+ q - quit; do not stage this hunk or any of the remaining ones
+ a - stage this hunk and all later hunks in the file
+ d - do not stage this hunk or any of the later hunks in the file
+ g - select a hunk to go to
+ / - search for a hunk matching the given regex
+ j - leave this hunk undecided, see next undecided hunk
+ J - leave this hunk undecided, see next hunk
+ k - leave this hunk undecided, see previous undecided hunk
+ K - leave this hunk undecided, see previous hunk
+ s - split the current hunk into smaller hunks
+ e - manually edit the current hunk
+ ? - print help
+
+https://git-scm.com/docs/git-add#Documentation/git-add.txt-patch
+
Splitting a repo
----------------