Fix coding style

- Use block for single statement ifs
- Keep lines to reasonable length (current debate as to reasonable)
- When functions return -1 for error test against 0 not -1
- Do not indent cases another level
- Do not test against NULL and 0 explicitly
- Use tabs for indentation, use spaces for alignment

components/run_command.c

@@ -17,10 +17,12 @@ run_command(const char *cmd)
 	}
 	p = fgets(buf, sizeof(buf) - 1, fp);
 	pclose(fp);
-	if (!p)
+	if (!p) {
 		return NULL;
-	if ((p = strrchr(buf, '\n')) != NULL)
+	}
+	if ((p = strrchr(buf, '\n'))) {
 		p[0] = '\0';
+	}
 
 	return buf[0] ? buf : NULL;
 }