Fix syntax highlighting in CONTRIBUTING.md (#2997)

Code snippets are now marked as cpp so that GitHub highlights them
correctly.

1 files changed, 6 insertions, 6 deletions

diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 89c3bb2eb..6db91c280 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -121,11 +121,11 @@ For names made of only one word, the first letter should be lowercase.
 For names made of multiple concatenated words, the first letter of the whole is lowercase, and the first letter of each subsequent word is capitalized.
 
 #### Indention
-For **C++ files** (*.cpp .h*): 4 spaces  
+For **C++ files** (*.cpp .h*): 4 spaces
 For **Qt-UI files** (*.ui*): 2 spaces
 
 #### Includes
-```c
+```cpp
 // Class includes
 #include "MyWidget.h"
 #include "ui_MyWidget.h"
@@ -140,7 +140,7 @@ For **Qt-UI files** (*.ui*): 2 spaces
 ```
 
 #### Classes
-```c
+```cpp
 // Note: order is important, stay organized!
 class MyWidget : public QWidget
 {
@@ -174,13 +174,13 @@ MyWidget::MyWidget(QWidget* parent)
 ```
 
 #### Pointers / References
-```c
+```cpp
 int* count;
 const QString& string;
 ```
 
 #### Braces
-```c
+```cpp
 if (condition) {
     doSomething();
 } else {
@@ -194,7 +194,7 @@ void ExampleClass::exampleFunction()
 ```
 
 #### Switch statement
-```c
+```cpp
 // Note: avoid declaring variables in a switch statement
 switch (a) {
 case 1: