[syserr] Whitespace fixes (indentation)

Author: tkoeppe

source/diagnostics.tex

@@ -1271,7 +1271,7 @@
 \indexlibrarymember{operator=}{error_code}%
 \begin{itemdecl}
 template <class ErrorCodeEnum>
-    error_code& operator=(ErrorCodeEnum e) noexcept;
+  error_code& operator=(ErrorCodeEnum e) noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -1364,8 +1364,7 @@
 \indexlibrarymember{operator<<}{error_code}%
 \begin{itemdecl}
 template <class charT, class traits>
-  basic_ostream<charT, traits>&
-    operator<<(basic_ostream<charT, traits>& os, const error_code& ec);
+  basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& os, const error_code& ec);
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -1476,7 +1475,7 @@
 \indexlibrarymember{operator=}{error_condition}%
 \begin{itemdecl}
 template <class ErrorConditionEnum>
-    error_condition& operator=(ErrorConditionEnum e) noexcept;
+  error_condition& operator=(ErrorConditionEnum e) noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}