Add SPDX identifiers

src/common/buf.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <ctype.h>
 #include "common/buf.h"
 

src/common/dir.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Find the configuration and theme directories
  *

src/common/font.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <cairo.h>
 #include <drm_fourcc.h>
 #include <pango/pangocairo.h>

src/common/grab-file.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Read file into memory
  *

src/common/nodename.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <ctype.h>
 #include <string.h>
 #include "common/nodename.h"

src/resistance.c

@@ -15,7 +15,7 @@ is_within_resistance_range(struct edges view, struct edges target,
 {
 	if (view.left >= other.left && target.left < other.left
 			&& target.left >= other.left - strength) {
-		 flags->left = 1;
+		flags->left = 1;
 	} else if (view.right <= other.right && target.right > other.right
 			&& target.right <= other.right + strength) {
 		flags->right = 1;