Correct the grammar
diff --git a/Doc/lib/libcodecs.tex b/Doc/lib/libcodecs.tex
index 6e0bc8d..05c0375 100644
--- a/Doc/lib/libcodecs.tex
+++ b/Doc/lib/libcodecs.tex
@@ -161,7 +161,7 @@
\end{funcdesc}
\begin{funcdesc}{lookup_error}{name}
-Return the error handler previously register under the name \var{name}.
+Return the error handler previously registered under the name \var{name}.
Raises a \exception{LookupError} in case the handler cannot be found.
\end{funcdesc}
@@ -366,7 +366,7 @@
define in order to be compatible with the Python codec registry.
\begin{classdesc}{IncrementalEncoder}{\optional{errors}}
- Constructor for a \class{IncrementalEncoder} instance.
+ Constructor for an \class{IncrementalEncoder} instance.
All incremental encoders must provide this constructor interface. They are
free to add additional keyword arguments, but only the ones defined
@@ -413,7 +413,7 @@
define in order to be compatible with the Python codec registry.
\begin{classdesc}{IncrementalDecoder}{\optional{errors}}
- Constructor for a \class{IncrementalDecoder} instance.
+ Constructor for an \class{IncrementalDecoder} instance.
All incremental decoders must provide this constructor interface. They are
free to add additional keyword arguments, but only the ones defined