enable BreakStringLiterals in clang-format; remove useless includes; fix image background

Author: fabianoriccardi

.clang-format

@@ -3,6 +3,7 @@
 # - ReflowComments: true
 # - MaxEmptyLinesToKeep: 1
 # - ColumnLimit: 100
+# - BreakStringLiterals: true
 
 Language: Cpp
 # LLVM is the default style setting, used when a configuration option is not set here
@@ -59,7 +60,7 @@ BreakBeforeBraces: Attach
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializers: BeforeColon
 BreakInheritanceList: BeforeColon
-BreakStringLiterals: false
+BreakStringLiterals: true
 ColumnLimit: 100
 # "" matches none
 CommentPragmas: ""

examples/rtc_memory_benchmark/rtc_memory_benchmark.ino

@@ -2,7 +2,6 @@
  * Benchmark and test the APIs offered by RTCMemory.
  * It shows the different speeds provided by RTC and flash memory.
  ***********************************************************************/
-#include <FS.h>
 #include <RTCMemory.h>
 
 void setup() {

examples/rtc_memory_with_backup/rtc_memory_with_backup.ino

@@ -2,7 +2,6 @@
  * This sketch shows how to store and retrieve a variable from
  * RTC memory and how to backup it on flash memory.
  ********************************************************************/
-#include <FS.h>
 #include <RTCMemory.h>
 
 // Define a struct that maps what's inside the RTC memory

extras/rtc_memory_layout.drawio.png

@@ -152,9 +152,12 @@ template<typename T, int N = 384> class RTCMemory {
 };
 template<typename T, int N>
 RTCMemory<T, N>::RTCMemory(String path, FS &fs) : ready(false), filePath(path), fileSystem(fs) {
-  static_assert(sizeof(T) <= MAX_USER_RTC_MEMORY_SIZE, "Error: max size of user data in RTC memory is 508 Byte");
-  static_assert(sizeof(RTCData) <= N,
-                "Error: you reached the max user-defined memory size. You may increase dedicated RTC memory over the default limit of 384 and up to 512 bytes, but you will lose the OTA capability.");
+  static_assert(sizeof(T) <= MAX_USER_RTC_MEMORY_SIZE, "Error: max size of user data in RTC memory "
+                                                       "is 508 Byte");
+  static_assert(sizeof(RTCData) <= N, "Error: you reached the max user-defined memory size. You "
+                                      "may increase dedicated RTC memory over the default limit of "
+                                      "384 and up to 512 bytes, but you will lose the OTA "
+                                      "capability.");
 }
 
 template<typename T, int N> bool RTCMemory<T, N>::begin() {