Cleanup: spelling in comments

intern/cycles/render/gpu_display.h

@@ -163,7 +163,7 @@ class GPUDisplay {
    * This call might happen in parallel with draw, but can never happen in parallel with the
    * update.
    *
-   * The actual zero-ing can be deferred to a later moment. What is important is that after clear
+   * The actual zeroing can be deferred to a later moment. What is important is that after clear
    * and before pixels update the drawing texture will be fully empty, and that partial update
    * after clear will write new pixel values for an updating area, leaving everything else zeroed.
    *

intern/cycles/render/osl.cpp

@@ -727,8 +727,8 @@ void OSLCompiler::add(ShaderNode *node, const char *name, bool isfilepath)
     }
   }
 
-  /* create shader of the appropriate type. OSL only distinguishes between "surface"
-   * and "displacement" atm */
+  /* Create shader of the appropriate type. OSL only distinguishes between "surface"
+   * and "displacement" at the moment. */
   if (current_type == SHADER_TYPE_SURFACE)
     ss->Shader("surface", name, id(node).c_str());
   else if (current_type == SHADER_TYPE_VOLUME)