Cleanup: Grammar in comments

"it's own" -> "its own" again. Start new sentences properly.

build_files/build_environment/cmake/ssl.cmake

@@ -41,7 +41,7 @@ else()
       # using the system directory `/etc/ssl` might seem the obvious choice,
       # there is no guarantee the version of SSL used with Blender is compatible with the systems,
       # where changes to the SSL configuration format can cause SSL not to load (see #114452).
-      # So reference a directory known not to exist. Ideally Blender could distribute it's own SSL
+      # So reference a directory known not to exist. Ideally Blender could distribute its own SSL
       # directory, but this isn't compatible with hard coded paths.
       # See #111132 & https://github.com/openssl/openssl/issues/20185 for details.
       -DOPENSSLDIR=\\"/dev/null\\"

intern/ghost/intern/GHOST_WindowWayland.cc

@@ -2395,12 +2395,12 @@ bool GHOST_WindowWayland::outputs_changed_update_scale()
 
 #ifdef WITH_GHOST_WAYLAND_LIBDECOR
     if (use_libdecor) {
-      /* LIBDECOR needs it's own logic, failing to do this causes the window border
+      /* LIBDECOR needs its own logic. Failing to do this causes the window border
        * not to follow the GHOST window on startup - with multiple monitors,
        * each with different fractional scale, see: #109194.
        *
        * Note that the window will show larger, then resize to be smaller soon
-       * after opening, this would be nice to avoid but but would require DPI
+       * after opening. This would be nice to avoid but but would require DPI
        * to be stored in the window (as noted above). */
       int size_next[2] = {0, 0};
       int size_orig[2] = {0, 0};

source/blender/draw/engines/eevee_next/shaders/eevee_light_eval_lib.glsl

@@ -18,7 +18,7 @@
 #pragma BLENDER_REQUIRE(eevee_shadow_lib.glsl)
 #pragma BLENDER_REQUIRE(gpu_shader_codegen_lib.glsl)
 
-/* If using compute, the shader should define it's own pixel. */
+/* If using compute, the shader should define its own pixel. */
 #if !defined(PIXEL) && defined(GPU_FRAGMENT_SHADER)
 #  define PIXEL gl_FragCoord.xy
 #endif

tests/utils/blender_headless.py

@@ -5,10 +5,10 @@
 
 """
 Wrapper for Blender that launches a graphical instances of Blender
-in it's own display-server.
+in its own display-server.
 
 This can be useful when a graphical context is required (when ``--background`` can't be used)
-and it's preferable not to have windows opening on the users system.
+and it's preferable not to have windows opening on the user's system.
 
 The main use case for this is tests that run simulated events, see: ``bl_run_operators_event_simulate.py``.