lua-filters: put all parameters in code font.

doc/lua-filters.md

@@ -4119,7 +4119,7 @@ separator and everything after from the given path.
 
 Parameters:
 
-filepath
+`filepath`
 :   path (string)
 
 Returns:
@@ -4132,7 +4132,7 @@ Get the file name.
 
 Parameters:
 
-filepath
+`filepath`
 :   path (string)
 
 Returns:
@@ -4145,7 +4145,7 @@ Checks whether a path is absolute, i.e. not fixed to a root.
 
 Parameters:
 
-filepath
+`filepath`
 :   path (string)
 
 Returns:
@@ -4159,7 +4159,7 @@ Checks whether a path is relative or fixed to a root.
 
 Parameters:
 
-filepath
+`filepath`
 :   path (string)
 
 Returns:
@@ -4173,7 +4173,7 @@ Join path elements back together by the directory separator.
 
 Parameters:
 
-filepaths
+`filepaths`
 :   path components (list of strings)
 
 Returns:
@@ -4192,13 +4192,13 @@ Set `unsafe` to a truthy value to a allow `..` in paths.
 
 Parameters:
 
-path
+`path`
 :   path to be made relative (string)
 
-root
+`root`
 :   root path (string)
 
-unsafe
+`unsafe`
 :   whether to allow `..` in the result. (boolean)
 
 Returns:
@@ -4218,7 +4218,7 @@ Normalizes a path.
 
 Parameters:
 
-filepath
+`filepath`
 :   path (string)
 
 Returns:
@@ -4231,7 +4231,7 @@ Splits a path by the directory separator.
 
 Parameters:
 
-filepath
+`filepath`
 :   path (string)
 
 Returns:
@@ -4246,7 +4246,7 @@ no extension, then the empty string is returned as the extension.
 
 Parameters:
 
-filepath
+`filepath`
 :   path (string)
 
 Returns:
@@ -4263,7 +4263,7 @@ Windows path elements are stripped of quotes.
 
 Parameters:
 
-search_path
+`search_path`
 :   platform-specific search path (string)
 
 Returns: