Fix jagged parentheses (#2234)

* Fix jagged parentheses

* Update screenshots

* Coordinate overlap with repeat element length.

* Fix lint error.

Co-authored-by: Erik Demaine <edemaine@mit.edu>

test/screenshotter/ss_data.yaml

@@ -103,7 +103,12 @@ DeepFontSizing:
     nolatex: \Huge inside \dfrac doesn't work, needs an extra {…}
 DelimiterSizing: |
     \bigl\uparrow\Bigl\downarrow\biggl\updownarrow
-    \Biggl\Uparrow\Biggr\Downarrow\biggr\langle\Bigr\}\bigr\rfloor
+    \Biggl\Uparrow\Biggr\Downarrow\biggr\langle\Bigr\}\bigr\rfloor \\
+    \begin{pmatrix}
+        a & b & c\\
+        a & b & c\\
+        a & b & c\\
+    \end{pmatrix}
 DisplayMode:
     tex: \sum_{i=0}^\infty \frac{1}{i}
     pre: pre