Update source/compatibility.tex

Co-authored-by: Johel Ernesto Guerrero Peña <[email protected]>

Author: tkoeppe

source/compatibility.tex

@@ -1624,8 +1624,7 @@
 Catches bugs.
 \effect
 Valid \CppIII{} code may fail to compile in this revision of \Cpp{}.
-For
-example:
+For example:
 \begin{codeblock}
 int x[] = { 2.0 };
 \end{codeblock}