Fix ptexts containing asterisks

doc/specs/vulkan/chapters/VK_KHR_display/display.txt

@@ -392,9 +392,9 @@ include::../../api/structs/VkDisplayPlaneCapabilitiesKHR.txt[]
     this plane using the specified mode.
   * pname:minDstPosition, pname:maxDstPosition, pname:minDstExtent,
     pname:maxDstExtent all have similar semantics to their corresponding
-    ptext:Src* equivalents, but apply to the output region within the mode
+    ptext:*Src* equivalents, but apply to the output region within the mode
     rather than the input region within the source image.
-    Unlike the ptext:Src* offsets, pname:minDstPosition and
+    Unlike the ptext:*Src* offsets, pname:minDstPosition and
     pname:maxDstPosition may: contain negative values.
 
 The minimum and maximum position and extent fields describe the hardware

doc/specs/vulkan/config/vulkan-macros/extension.rb

@@ -169,12 +169,12 @@ end
 
 class PnameInlineMacro < ParamInlineMacroBase
     named :pname
-    match /pname:((\w[\w.]*)*\w+)/
+    match /pname:(\w+(\.\w+)*)/
 end
 
 class PtextInlineMacro < ParamInlineMacroBase
     named :ptext
-    match /ptext:((\w[\w.]*)*\w+)/
+    match /ptext:([\w\*]+(\.[\w\*]+)*)/
 end
 
 class DnameInlineMacro < CodeInlineMacroBase