Fix missing whitespace in surface extension missing error messages
diff --git a/src/video/android/SDL_androidvulkan.c b/src/video/android/SDL_androidvulkan.c
index 52ba162..380fb6e 100644
--- a/src/video/android/SDL_androidvulkan.c
+++ b/src/video/android/SDL_androidvulkan.c
@@ -91,7 +91,7 @@
         SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     } else if (!hasAndroidSurfaceExtension) {
-        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_ANDROID_SURFACE_EXTENSION_NAME "extension");
+        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_ANDROID_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     }
     return true;
diff --git a/src/video/kmsdrm/SDL_kmsdrmvulkan.c b/src/video/kmsdrm/SDL_kmsdrmvulkan.c
index 493e629..1f374c6 100644
--- a/src/video/kmsdrm/SDL_kmsdrmvulkan.c
+++ b/src/video/kmsdrm/SDL_kmsdrmvulkan.c
@@ -117,7 +117,7 @@
         SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     } else if (!hasDisplayExtension) {
-        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_DISPLAY_EXTENSION_NAME "extension");
+        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_DISPLAY_EXTENSION_NAME " extension");
         goto fail;
     }
 
diff --git a/src/video/vivante/SDL_vivantevulkan.c b/src/video/vivante/SDL_vivantevulkan.c
index 30629eb..fcc4ae1 100644
--- a/src/video/vivante/SDL_vivantevulkan.c
+++ b/src/video/vivante/SDL_vivantevulkan.c
@@ -98,7 +98,7 @@
         SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     } else if (!hasDisplayExtension) {
-        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_DISPLAY_EXTENSION_NAME "extension");
+        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_DISPLAY_EXTENSION_NAME " extension");
         goto fail;
     }
     return true;
diff --git a/src/video/wayland/SDL_waylandvulkan.c b/src/video/wayland/SDL_waylandvulkan.c
index 448a8d6..cdf60be 100644
--- a/src/video/wayland/SDL_waylandvulkan.c
+++ b/src/video/wayland/SDL_waylandvulkan.c
@@ -103,7 +103,7 @@
         SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     } else if (!hasWaylandSurfaceExtension) {
-        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_WAYLAND_SURFACE_EXTENSION_NAME "extension");
+        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_WAYLAND_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     }
     return true;
diff --git a/src/video/windows/SDL_windowsvulkan.c b/src/video/windows/SDL_windowsvulkan.c
index 04c87a3..a1e764f 100644
--- a/src/video/windows/SDL_windowsvulkan.c
+++ b/src/video/windows/SDL_windowsvulkan.c
@@ -91,7 +91,7 @@
         SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     } else if (!hasWin32SurfaceExtension) {
-        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_WIN32_SURFACE_EXTENSION_NAME "extension");
+        SDL_SetError("Installed Vulkan doesn't implement the " VK_KHR_WIN32_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     }
     return true;
diff --git a/src/video/x11/SDL_x11vulkan.c b/src/video/x11/SDL_x11vulkan.c
index 5cc7222..1ecc6e2 100644
--- a/src/video/x11/SDL_x11vulkan.c
+++ b/src/video/x11/SDL_x11vulkan.c
@@ -120,7 +120,7 @@
     if (hasXlibSurfaceExtension) {
         videoData->vulkan_xlib_xcb_library = NULL;
     } else if (!hasXCBSurfaceExtension) {
-        SDL_SetError("Installed Vulkan doesn't implement either the " VK_KHR_XCB_SURFACE_EXTENSION_NAME "extension or the " VK_KHR_XLIB_SURFACE_EXTENSION_NAME " extension");
+        SDL_SetError("Installed Vulkan doesn't implement either the " VK_KHR_XCB_SURFACE_EXTENSION_NAME " extension or the " VK_KHR_XLIB_SURFACE_EXTENSION_NAME " extension");
         goto fail;
     } else {
         const char *libX11XCBLibraryName = SDL_GetHint(SDL_HINT_X11_XCB_LIBRARY);