Bind cm{motion} to full macro expansion of the form described by
the motion (using clojure.core/macroexpand), and bind c1m{motion}
to partial macro expansion of the form described by the motion
(using clojure.core/macroexpand-1).
cmm and c1mm will apply the expansion to the form under the cursor.
When sending code to the repl from a fugitive :Gd
or :Ge, remove the "fugitive://" prefix, and
"/.git/<rev number>/" path from the buffer name.
This allows for evaluation of code from previous
revisions of a file when inside of a fugitive :Gdiff
or :Gedit window.
