[doc] Devman: fixes a typo in the landmarks profiling section.

doc/developer/advance.tex

@@ -827,7 +827,7 @@ Name & Expansion \\
 \verb|frama-c| & path to \framac executable \\
 \hline
 \verb|PTEST_CONFIG| & either the empty string or \verb|_| followed by the
-name of the current alternative configuration 
+name of the current alternative configuration
 (see section~\ref{ptests:structure}). \\
 \hline
 \verb|PTEST_DIR| & current test suite directory \\
@@ -4211,7 +4211,7 @@ For quick usage of the library:
   The easiest setup is \texttt{OCAML\_LANDMARKS=auto}, which will instrument
   everything and output timing information to \texttt{stderr} after
   program termination.
-  You can also use \texttt{OCAML\_LANDMARKS=auto,stdout=landmarks.log} to
+  You can also use \texttt{OCAML\_LANDMARKS=auto,output=landmarks.log} to
   output the timing information to file \texttt{landmarks.log}.
 \item you can also run the instrumented \framac without installing it, via
   \texttt{dune exec}: