LaTeX writer: Protect VERB in caption (#11139)

Also apply hlint suggestions for fewer imports and
moving brackets to avoid $.

1 files changed, 80 insertions, 0 deletions

diff --git a/test/command/6821.md b/test/command/6821.md
new file mode 100644
index 000000000..c38953248
--- /dev/null
+++ b/test/command/6821.md
@@ -0,0 +1,80 @@
+```
+% pandoc -f native -t latex
+[ Para [ Code ( "" , [ "python" ] , [] ) "x = 5" ]
+, Figure
+    ( "" , [] , [] )
+    (Caption
+       Nothing
+       [ Plain
+           [ Str "This"
+           , Space
+           , Str "is"
+           , Space
+           , Str "a"
+           , Space
+           , Str "test"
+           , Space
+           , Code ( "" , [ "python" ] , [] ) "x = 5"
+           ]
+       ])
+    [ Plain
+        [ Image
+            ( "" , [] , [] )
+            [ Str "This"
+            , Space
+            , Str "is"
+            , Space
+            , Str "a"
+            , Space
+            , Str "test"
+            , Space
+            , Code ( "" , [ "python" ] , [] ) "x = 5"
+            ]
+            ( "test.png" , "" )
+        ]
+    ]
+, Table
+    ( "" , [] , [] )
+    (Caption
+       Nothing
+       [ Plain [ Code ( "" , [ "cpp" ] , [] ) "caption" ] ])
+    [ ( AlignDefault , ColWidthDefault ) ]
+    (TableHead ( "" , [] , [] ) [])
+    [ TableBody ( "" , [] , [] ) (RowHeadColumns 0) [] [] ]
+    (TableFoot
+       ( "" , [] , [] )
+       [ Row
+           ( "" , [] , [] )
+           [ Cell
+               ( "" , [] , [] )
+               AlignDefault
+               (RowSpan 1)
+               (ColSpan 1)
+               [ Plain [ Str "A" ] ]
+           ]
+       ])
+, Para [ Code ( "" , [ "cpp" ] , [] ) "caption" ]
+]
+^D
+\VERB|\NormalTok{x }\OperatorTok{=} \DecValTok{5}|
+
+\begin{figure}
+\centering
+\pandocbounded{\includegraphics[keepaspectratio,alt={This is a test x = 5}]{test.png}}
+\caption{This is a test
+\protect\VERB|\NormalTok{x }\OperatorTok{=} \DecValTok{5}|}
+\end{figure}
+
+\begin{longtable}[]{@{}l@{}}
+\caption{\protect\VERB|\NormalTok{caption}|}\tabularnewline
+\toprule\noalign{}
+\endfirsthead
+\endhead
+\midrule\noalign{}
+A \\
+\bottomrule\noalign{}
+\endlastfoot
+\end{longtable}
+
+\VERB|\NormalTok{caption}|
+```