diff --git a/Doc/lib/emailmessage.tex b/Doc/lib/emailmessage.tex
index dbd1afd..7618b20 100644
--- a/Doc/lib/emailmessage.tex
+++ b/Doc/lib/emailmessage.tex
@@ -561,7 +561,7 @@
 will be the argument \var{payload}.
 
 If the object's payload was already a list
-(i.e. \method{is_multipart()} returns 1), then \var{payload} is
+(i.e. \method{is_multipart()} returns \code{True}), then \var{payload} is
 appended to the end of the existing payload list.
 
 For any other type of existing payload, \method{add_payload()} will
diff --git a/Doc/lib/libcfgparser.tex b/Doc/lib/libcfgparser.tex
index 6eba042..deec8ec 100644
--- a/Doc/lib/libcfgparser.tex
+++ b/Doc/lib/libcfgparser.tex
@@ -165,8 +165,8 @@
 \end{methoddesc}
 
 \begin{methoddesc}{has_option}{section, option}
-If the given section exists, and contains the given option. return 1;
-otherwise return 0.
+If the given section exists, and contains the given option,
+return \constant{True}; otherwise return \constant{False}.
 \versionadded{1.6}
 \end{methoddesc}
 
@@ -245,7 +245,8 @@
 \begin{methoddesc}{remove_option}{section, option}
 Remove the specified \var{option} from the specified \var{section}.
 If the section does not exist, raise \exception{NoSectionError}. 
-If the option existed to be removed, return 1; otherwise return 0.
+If the option existed to be removed, return \constant{True};
+otherwise return \constant{False}.
 \versionadded{1.6}
 \end{methoddesc}
 
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index a8ceac8..c96a990 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -272,7 +272,7 @@
 Availability: \UNIX.
 \end{funcdesc}
 
-% placed in this section since it relates to errno.... a little weak ;-(
+% placed in this section since it relates to errno.... a little weak
 \begin{funcdesc}{strerror}{code}
 Return the error message corresponding to the error code in
 \var{code}.
@@ -616,7 +616,8 @@
 specified access to \var{path}.  \var{mode} should be \constant{F_OK}
 to test the existence of \var{path}, or it can be the inclusive OR of
 one or more of \constant{R_OK}, \constant{W_OK}, and \constant{X_OK} to
-test permissions.  Return \code{1} if access is allowed, \code{0} if not.
+test permissions.  Return \constant{True} if access is allowed,
+\constant{False} if not.
 See the \UNIX{} man page \manpage{access}{2} for more information.
 Availability: \UNIX, Windows.
 \end{funcdesc}
diff --git a/Doc/lib/libsmtplib.tex b/Doc/lib/libsmtplib.tex
index 92661db..491f75b 100644
--- a/Doc/lib/libsmtplib.tex
+++ b/Doc/lib/libsmtplib.tex
@@ -146,8 +146,9 @@
 \end{methoddesc}
 
 \begin{methoddesc}{has_extn}{name}
-Return \code{1} if \var{name} is in the set of SMTP service extensions
-returned by the server, \code{0} otherwise.  Case is ignored.
+Return \constant{True} if \var{name} is in the set of SMTP service
+extensions returned by the server, \constant{False} otherwise.
+Case is ignored.
 \end{methoddesc}
 
 \begin{methoddesc}{verify}{address}