Updates readme

keyboard/ergodox_ez/README.md

@@ -16,9 +16,9 @@ This requires a little bit of familiarity with coding.
 1. Go to https://github.com/jackhumbert/qmk_firmware and read the Readme at the base of this repository, top to bottom. Then come back here :)
 2. Clone the repository (download it)
 3. Set up a build environment as per https://www.pjrc.com/teensy/gcc.html
-4. Copy keymaps/keymap_default.c into keymaps/your_keymap_name.c
+4. Copy `keymaps/keymap_default.c` into `keymaps/keymaps_your_name.c` (for example, `keymaps/keymap_german.c`)
 5. Edit this file, changing keycodes to your liking (see "Finding the keycodes you need" below). Try to edit the comments as well, so the "text graphics" represent your layout correctly.
-6. Compile your firmware by running `make clean` followed by `make KEYMAP=your_keymap_name`. This will result in a hex file.
+6. Compile your firmware by running `make clean` followed by `make KEYMAP=your_name`. Note that you must omit the `keymap_` prefix for your filename in this command -- for example, `make KEYMAP=german`. This will result in a hex file, which will always be called `ergodox_ez.hex`, regardless of your keymap name.
 6. Flash this hex file using the [Teensy loader](https://www.pjrc.com/teensy/loader.html) as described in step 4 in the "Easy Way" above.
 7. Submit your work as a pull request to this repository, so others can also use it. :)