doxygen directory fix

Doxyfile

diff --git a/Doxyfile b/Doxyfile
index 01d7d52..d4912c5 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -58,7 +58,7 @@
 # entered, it will be relative to the location where doxygen was started. If
 # left blank the current directory will be used.
 
-OUTPUT_DIRECTORY       = @CMAKE_SOURCE_DIR@/docs
+OUTPUT_DIRECTORY       = "@CMAKE_SOURCE_DIR@/docs"
 
 # If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
 # directories (in 2 levels) under the output directory of each output format and
@@ -864,7 +864,7 @@
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = @CMAKE_SOURCE_DIR@/include/vk_mem_alloc.h
+INPUT                  = "@CMAKE_SOURCE_DIR@/include/vk_mem_alloc.h"
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses