Cleanup: spelling in comments & string

Also back-tick quote literals in CMakeLists files.

intern/cycles/kernel/CMakeLists.txt

@@ -859,7 +859,7 @@ if(WITH_CYCLES_CUDA_BINARIES AND WITH_CYCLES_DEVICE_OPTIX)
     set(cuda_version ${CUDA_VERSION})
     if("${CUDA_VERSION}" GREATER_EQUAL 130) # Support for Maxwell, Pascal and Volta was dropped in CUDA 13
       if(DEFINED CUDA11_NVCC_EXECUTABLE)
-        # Use CUDA 11 for the OptiX PTX kernel, to retain support for older achitectures
+        # Use CUDA 11 for the OptiX PTX kernel, to retain support for older architectures.
         set(cuda_nvcc_executable ${CUDA11_NVCC_EXECUTABLE})
         set(cuda_version 110)
       else()

intern/ghost/CMakeLists.txt

@@ -388,7 +388,7 @@ elseif(WITH_GHOST_X11 OR WITH_GHOST_WAYLAND)
     generate_protocol_bindings(
       "${WAYLAND_PROTOCOLS_DIR}/staging/fractional-scale/fractional-scale-v1.xml"
     )
-    # Viewport (only required when fractional scale is in use).
+    # ViewPorter (only required when fractional scale is in use).
     generate_protocol_bindings(
       "${WAYLAND_PROTOCOLS_DIR}/stable/viewporter/viewporter.xml"
     )

intern/guardedalloc/MEM_guardedalloc.h

@@ -382,8 +382,8 @@ inline T *MEM_new(const char *allocation_name, Args &&...args)
  *
  * \note This function uses 'default initialization' on zero-initialized memory, _not_ 'value
  * initialization'. This means that even if a user-defined default constructor is provided,
- * non-explicitely initialized data will be zero-initialized. For POD types (e.g. pure C-style
- * structs), its behavior is functionnally identical to using `MEM_callocN<T>()`.
+ * non-explicitly initialized data will be zero-initialized. For POD types (e.g. pure C-style
+ * structs), its behavior is functionally identical to using `MEM_callocN<T>()`.
  *
  * \warning This function is intended as a temporary work-around during the process of converting
  * Blender data management from C-style (alloc/free) to C++-style (new/delete). It will be removed