[bad.alloc] Remove indentation in itemdecl.

Author: jwakely

source/support.tex

@@ -2149,8 +2149,8 @@
 \indexlibrary{\idxcode{bad_alloc}!\idxcode{bad_alloc}}%
 \indexlibrary{\idxcode{operator=}!\tcode{bad_alloc}}%
 \begin{itemdecl}
-    bad_alloc(const bad_alloc&) noexcept;
-    bad_alloc& operator=(const bad_alloc&) noexcept;
+bad_alloc(const bad_alloc&) noexcept;
+bad_alloc& operator=(const bad_alloc&) noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}