Repair missing spaces after \UNIX.
diff --git a/Doc/api/init.tex b/Doc/api/init.tex
index e380bdb..76fcf61 100644
--- a/Doc/api/init.tex
+++ b/Doc/api/init.tex
@@ -245,7 +245,7 @@
program name (set by \cfunction{Py_SetProgramName()} above) and some
environment variables. The returned string consists of a series of
directory names separated by a platform dependent delimiter
- character. The delimiter character is \character{:} on \UNIX and Mac OS X,
+ character. The delimiter character is \character{:} on \UNIX{} and Mac OS X,
\character{;} on Windows. The returned string points into
static storage; the caller should not modify its value. The value
is available to Python code as the list
diff --git a/Doc/inst/inst.tex b/Doc/inst/inst.tex
index 6db22ac..adc686e 100644
--- a/Doc/inst/inst.tex
+++ b/Doc/inst/inst.tex
@@ -296,7 +296,7 @@
\filevar{prefix} and \filevar{exec-prefix} stand for the directories
that Python is installed to, and where it finds its libraries at
run-time. They are always the same under Windows, and very
-often the same under \UNIX and Mac OS X. You can find out what your Python
+often the same under \UNIX{} and Mac OS X. You can find out what your Python
installation uses for \filevar{prefix} and \filevar{exec-prefix} by
running Python in interactive mode and typing a few simple commands.
Under \UNIX, just type \code{python} at the shell prompt. Under
diff --git a/Doc/lib/libposixpath.tex b/Doc/lib/libposixpath.tex
index 851e459..7684fa0 100644
--- a/Doc/lib/libposixpath.tex
+++ b/Doc/lib/libposixpath.tex
@@ -58,7 +58,7 @@
\end{funcdesc}
\begin{funcdesc}{expanduser}{path}
-On \UNIX and Windows, return the argument with an initial component of
+On \UNIX{} and Windows, return the argument with an initial component of
\samp{\~} or \samp{\~\var{user}} replaced by that \var{user}'s home directory.
On \UNIX, an initial \samp{\~} is replaced by the environment variable
diff --git a/Doc/mac/using.tex b/Doc/mac/using.tex
index b21a98e..bf3174d 100644
--- a/Doc/mac/using.tex
+++ b/Doc/mac/using.tex
@@ -2,7 +2,7 @@
\sectionauthor{Bob Savage}{bobsavage@mac.com}
Python on a Macintosh running Mac OS X is in principle very similar to
-Python on any other \UNIX platform, but there are a number of additional
+Python on any other \UNIX{} platform, but there are a number of additional
features such as the IDE and the Package Manager that are worth pointing out.
Python on Mac OS 9 or earlier can be quite different from Python on