LaTeX reader: better handle spacing commands...

hfill, vfill, hskip, vskip, etc.

Closes #9150.

src/Text/Pandoc/Readers/LaTeX/Parsing.hs

@@ -983,6 +983,18 @@ getRawCommand name txt = do
              void (manyTill anyTok braced) <|>
                 void (satisfyTok isPreTok) -- see #7531
            _ | isFontSizeCommand name -> return ()
+             | name `elem` ["hfil", "hfill", "vfil", "vfill",
+                            "hfilneg", "vfilneg"] -> return ()
+             | name `elem` ["hskip", "vskip", "mskip"] -> do
+                 dimenarg
+                 skipMany $ try $ do
+                   sp
+                   satisfyTok $
+                     \case
+                       Tok _ Word "plus" -> True
+                       Tok _ Word "minus" -> True
+                       _ -> False
+                   dimenarg
              | otherwise -> do
                skipopts
                option "" (try dimenarg)

test/command/9150.md

@@ -0,0 +1,51 @@
+```
+% pandoc -f latex -t native
+\hfill  {\Large \textbf{Theoretische Grundlagen der Informatik}}
+^D
+[ Para
+    [ Span
+        ( "" , [] , [] )
+        [ Strong
+            [ Str "Theoretische"
+            , Space
+            , Str "Grundlagen"
+            , Space
+            , Str "der"
+            , Space
+            , Str "Informatik"
+            ]
+        ]
+    ]
+]
+```
+
+```
+% pandoc -f latex+raw_tex -t native
+\hfill  {\Large \textbf{Theoretische Grundlagen der Informatik}}
+^D
+[ Para
+    [ RawInline (Format "latex") "\\hfill  "
+    , Span
+        ( "" , [] , [] )
+        [ RawInline (Format "latex") "\\Large "
+        , Strong
+            [ Str "Theoretische"
+            , Space
+            , Str "Grundlagen"
+            , Space
+            , Str "der"
+            , Space
+            , Str "Informatik"
+            ]
+        ]
+    ]
+]
+```
+
+```
+% pandoc -f latex+raw_tex -t native
+\hskip 2pt plus 1pt minus 1pt
+^D
+[ RawBlock (Format "latex") "\\hskip 2pt plus 1pt minus 1pt"
+]
+```