Prevent clang-format messing up placeholder tokens within keyboard templates (#6790)

* Use .template file extension for keyboard template files

* Filter out .template files completely before passing to clang-format

* Undo file extension stuff; just ignore quantum/template dir

quantum/template/base/keyboard.h

@@ -25,5 +25,11 @@
  * The second converts the arguments into a two-dimensional array which
  * represents the switch matrix.
  */
-#define LAYOUT(k00, k01, k02, k10, k11) \
-    { {k00, k01, k02}, {k10, KC_NO, k11}, }
+#define LAYOUT( \
+    k00, k01, k02, \
+      k10,  k11   \
+) \
+{ \
+    { k00, k01,   k02 }, \
+    { k10, KC_NO, k11 }, \
+}

quantum/template/base/keymaps/default/keymap.c

@@ -16,11 +16,16 @@
 #include QMK_KEYBOARD_H
 
 // Defines the keycodes used by our macros in process_record_user
-enum custom_keycodes { QMKBEST = SAFE_RANGE, QMKURL };
+enum custom_keycodes {
+    QMKBEST = SAFE_RANGE,
+    QMKURL
+};
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
-    [0] = LAYOUT(/* Base */
-                 KC_A, KC_1, KC_H, KC_TAB, KC_SPC),
+    [0] = LAYOUT( /* Base */
+        KC_A, KC_1, KC_H,
+          KC_TAB, KC_SPC
+    ),
 };
 
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
@@ -45,8 +50,14 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
     return true;
 }
 
-void matrix_init_user(void) {}
+void matrix_init_user(void) {
 
-void matrix_scan_user(void) {}
+}
 
-void led_set_user(uint8_t usb_led) {}
+void matrix_scan_user(void) {
+
+}
+
+void led_set_user(uint8_t usb_led) {
+
+}

quantum/template/base/keymaps/default/readme.md

@@ -1 +1 @@
-# The default keymap for %KEYBOARD%
+# The default keymap for %KEYBOARD%