Some clang-format tweaks to optimize code style

doc/development.md

@@ -160,6 +160,26 @@ if (var == 2) {
 printf("%d\n", var);
 ```
 
+#### Empty line at the start of blocks
+There are situations when you want to have an empty line at the start of the block to enhance readability, for example:
+```
+if (a && 
+    b && 
+    c) {
+    d = 5;
+}
+```
+
+Here the assignment aligns with the conditions of the if-black making it hard to read. Better:
+```
+if (a && 
+    b && 
+    c) {
+
+    d = 5;
+}
+```
+
 #### Includes
 * Always keep all includes at the top of a header and source file. Exception: Documentation before include guards on
 header file.
@@ -311,6 +331,20 @@ Upper-case with underscore as spacing, proper namespacing to namespace and modul
 #define EZUSB_DEVICE_VID 0xFFFF
 ```
 
+#### Multiple variable declarations
+Only one declaration per line which also avoids various errors, for example:
+```
+// Nope
+char a, b, b;
+```
+
+```
+// Ok
+char a;
+char b;
+char c;
+```
+
 ### Testing
 We advice you to write unit tests for all modules that allow proper unit testing. This applies to modules that are not
 part of the actual hooking process and do not rely on external devices to be available. Add these tests to the