Replace more non-codeblocks with outputblocks.

Author: Eelis

source/iostreams.tex

@@ -17372,16 +17372,16 @@
 \pnum
 \begin{example}
 Given this directory structure:
-\begin{codeblock}
+\begin{outputblock}
 /dir1
   file1
   file2
   dir2
     file3
-\end{codeblock}
+\end{outputblock}
 
 Calling \tcode{copy("/dir1", "/dir3")} would result in:
-\begin{codeblock}
+\begin{outputblock}
 /dir1
   file1
   file2
@@ -17390,10 +17390,10 @@
 /dir3
   file1
   file2
-\end{codeblock}
+\end{outputblock}
 
 Alternatively, calling \tcode{copy("/dir1", "/dir3", copy_options::recursive)} would result in:
-\begin{codeblock}
+\begin{outputblock}
 /dir1
   file1
   file2
@@ -17404,7 +17404,7 @@
   file2
   dir2
     file3
-\end{codeblock}
+\end{outputblock}
 \end{example}
 \end{itemdescr}
 

source/uax31.tex

@@ -34,11 +34,11 @@
 the \tcode{<Medial>} set is empty, and
 the \tcode{<Continue>} characters are unmodified.
 In the grammar used in \UAX{31}, this is
-\begin{codeblock}
+\begin{outputblock}
 <Identifier> := <Start> <Continue>*
 <Start> := XID_Start + @\textrm{\ucode{005f}}@
 <Continue> := <Start> + XID_Continue
-\end{codeblock}
+\end{outputblock}
 
 \pnum
 This is described in the \Cpp{} grammar in \ref{lex.name},