table-short-captions: fix outdated tests

The generated output was changed by by 7a49118 (Fix #48 by using
\let=\relax and \@ifundefined, 2019-03-31).

Author: smancill

table-short-captions/test-table-short-captions-crossref.sh

@@ -50,7 +50,7 @@ assert_contains <<EOF
 caption} of tbl3, which is \textbf{unlisted}.}\tabularnewline
 EOF
 assert_contains <<EOF
-\undef\pandoctableshortcapt
+\let\pandoctableshortcapt\relax
 EOF
 
 # Test 4
@@ -66,7 +66,7 @@ caption} of tbl4, which has an \textbf{overriding} short-caption. This
 is the expected usage.}\tabularnewline
 EOF
 assert_contains <<EOF
-\undef\pandoctableshortcapt
+\let\pandoctableshortcapt\relax
 EOF
 
 # Test 5
@@ -115,5 +115,5 @@ caption} of tbl9, which is \textbf{unlisted}, yet has a
 short-caption.}\tabularnewline
 EOF
 assert_contains <<EOF
-\undef\pandoctableshortcapt
+\let\pandoctableshortcapt\relax
 EOF

table-short-captions/test-table-short-captions.sh

@@ -46,7 +46,7 @@ assert_contains <<EOF
 \textbf{unlisted}. \{\#tbl:tbl-label3\}}\tabularnewline
 EOF
 assert_contains <<EOF
-\undef\pandoctableshortcapt
+\let\pandoctableshortcapt\relax
 EOF
 
 # Test 4
@@ -59,7 +59,7 @@ an \textbf{overriding} short-caption. This is the expected usage.
 \{\#tbl:tbl-label4\}}\tabularnewline
 EOF
 assert_contains <<EOF
-\undef\pandoctableshortcapt
+\let\pandoctableshortcapt\relax
 EOF
 
 # Test 5
@@ -101,5 +101,5 @@ assert_contains <<EOF
 \{\#tbl:tbl-label9\}}\tabularnewline
 EOF
 assert_contains <<EOF
-\undef\pandoctableshortcapt
+\let\pandoctableshortcapt\relax
 EOF