Minor markup adjustments.
Move some index entries next to what they are referring to for better
"targetting".
diff --git a/Doc/ref/ref4.tex b/Doc/ref/ref4.tex
index 91713f9..8366a5f 100644
--- a/Doc/ref/ref4.tex
+++ b/Doc/ref/ref4.tex
@@ -24,9 +24,9 @@
`\strong{-c}' option) is a code block. The file read by the built-in
function \function{execfile()} is a code block. The string argument
passed to the built-in function \function{eval()} and to the
-\keyword{exec} statement is a code block. And finally, the expression
-read and evaluated by the built-in function \function{input()} is a
-code block.
+\keyword{exec}\stindex{exec} statement is a code block. And finally,
+the expression read and evaluated by the built-in function
+\function{input()} is a code block.
A code block is executed in an execution frame. An \dfn{execution
frame}\indexii{execution}{frame} contains some administrative
@@ -86,10 +86,11 @@
Whether a name is local or global in a code block is determined by
static inspection of the source text for the code block: in the
-absence of \keyword{global} statements, a name that is bound anywhere
-in the code block is local in the entire code block; all other names
-are considered global. The \keyword{global} statement forces global
-interpretation of selected names throughout the code block.
+absence of \keyword{global}\stindex{global} statements, a name that is
+bound anywhere in the code block is local in the entire code block;
+all other names are considered global. The \keyword{global} statement
+forces global interpretation of selected names throughout the code
+block.
The following constructs bind names: formal parameters to functions,
\keyword{import} statements, class and function definitions (these
@@ -97,9 +98,9 @@
that are identifiers if occurring in an assignment, \keyword{for} loop
header, or in the second position of an \keyword{except} clause
header. The \keyword{import} statement of the form ``\samp{from
-\ldots import *}'' binds all names defined in the imported module,
-except those beginning with an underscore. This form may only be used
-at the module level.
+\ldots import *}''\stindex{from} binds all names defined in the
+imported module, except those beginning with an underscore. This form
+may only be used at the module level.
A target occurring in a \keyword{del} statement is also considered bound
for this purpose (though the actual semantics are to unbind the
@@ -110,15 +111,12 @@
searched in the built-in namespace (which is actually the global
namespace of the module \module{__builtin__}\refbimodindex{__builtin__}).
The built-in namespace associated with the execution of a code block
-is actually found by looking up the name \code{__builtins__} is its
+is actually found by looking up the name \code{__builtins__} in its
global namespace; this should be a dictionary or a module (in the
-latter case its dictionary is used). Normally, the
+latter case the module's dictionary is used). Normally, the
\code{__builtins__} namespace is the dictionary of the built-in module
\module{__builtin__} (note: no `s'). If it isn't, restricted
execution\indexii{restricted}{execution} mode is in effect.
-\stindex{from}
-\stindex{exec}
-\stindex{global}
The namespace for a module is automatically created the first time a
module is imported. The main module for a script is always called