diff --git a/Doc/lib/libposixfile.tex b/Doc/lib/libposixfile.tex
index 3b7c0149285..3d1fad1297d 100644
--- a/Doc/lib/libposixfile.tex
+++ b/Doc/lib/libposixfile.tex
@@ -53,8 +53,7 @@ The posixfile module defines the following functions:
 The posixfile object defines the following additional methods:
 
 \renewcommand{\indexsubitem}{(posixfile method)}
-\begin{funcdesc}{lock}{fmt\, \optional{len\optional{\, start
-\optional{\, whence}}}}
+\begin{funcdesc}{lock}{fmt\, \optional{len\optional{\, start\optional{\, whence}}}}
  Lock the specified section of the file that the file object is
  referring to.  The format is explained
  below in a table.  The \var{len} argument specifies the length of the
diff --git a/Doc/libposixfile.tex b/Doc/libposixfile.tex
index 3b7c0149285..3d1fad1297d 100644
--- a/Doc/libposixfile.tex
+++ b/Doc/libposixfile.tex
@@ -53,8 +53,7 @@ The posixfile module defines the following functions:
 The posixfile object defines the following additional methods:
 
 \renewcommand{\indexsubitem}{(posixfile method)}
-\begin{funcdesc}{lock}{fmt\, \optional{len\optional{\, start
-\optional{\, whence}}}}
+\begin{funcdesc}{lock}{fmt\, \optional{len\optional{\, start\optional{\, whence}}}}
  Lock the specified section of the file that the file object is
  referring to.  The format is explained
  below in a table.  The \var{len} argument specifies the length of the