fix duplicate words

original commit: 38ade9595fe9771a02b00e22a50cede215a6b9ce

csug/compat.stex

@@ -23,7 +23,7 @@ Section~\ref{SECTCOMPATEXTENDSYNTAX}
 describes \scheme{extend-syntax} macros.
 These features are supported directly by current versions of {\ChezScheme},
 but support may be dropped in future versions.
-New programs should use the standard mechanisms described in
+New programs should use the standard mechanisms described
 in \emph{The Scheme Programming Language, 4th Edition}~\cite{Dybvig:tspl4}
 instead.
 

csug/control.stex

@@ -287,7 +287,7 @@ The first form is identical to the Revised$^6$ Report \scheme{dynamic-wind}.
 When the optional \var{critical?} argument is present and non-false,
 the \var{in} thunk is invoked in a critical section along with the code
 that records that the body has been entered, and the \var{out} thunk is
-invoked in a critical section section along with the code that records
+invoked in a critical section along with the code that records
 that the body has been exited.
 Extreme caution must be taken with this form of \scheme{dynamic-wind},
 since an error or long-running computation can leave interrupts

csug/csug.bib

@@ -444,7 +444,7 @@ year = 1995}
 author = {Oscar Waddell and Dipanwita Sarkar and R. Kent Dybvig},
 title = {Fixing Letrec: A Faithful Yet Efficient Implementation of {Scheme}'s
 Recursive Binding Construct},
-journal = {Higher-order and and symbolic computation},
+journal = {Higher-order and symbolic computation},
 volume = 18,
 number = "3/4",
 pages = {299--326},

csug/expeditor.stex

@@ -120,7 +120,7 @@ Its default value is \scheme{100}.
 \endentryheader
 
 The value of \scheme{ee-default-repeat} is a nonnegative fixnum
-value that determines the number of of times the next command is
+value that determines the number of times the next command is
 repeated after the \scheme{ee-command-repeat} editing command
 (bound to \scheme{Esc-^U} by default) is used and \emph{not}
 followed by a sequence of digits.

csug/foreign.stex

@@ -3485,7 +3485,7 @@ A thread created via the Scheme procedure \scheme{fork-thread} starts
 in the active state and need not be activated.
 Any thread that has been deactivated, and any
 thread created by some mechanism other than \scheme{fork-thread} must,
-however, be activated before before it can access Scheme data or execute
+however, be activated before it can access Scheme data or execute
 Scheme code. A foreign callable that is declared with \scheme{__collect_safe}
 can activate a calling thread.
 Otherwise, \scheme{Sactivate_thread} must be used to activate a thread.

csug/intro.stex

@@ -131,7 +131,7 @@ valid identifiers in {\ChezScheme}.
 Second, the single-character sequences \scheme{\schlbrace} and
 \scheme{\schrbrace} are identifiers.
 Third, identifiers containing arbitrary characters may be printed by
-escaping them them with \scheme{\} or with \scheme{|}.
+escaping them with \scheme{\} or with \scheme{|}.
 \scheme{\} is used to escape a single character (except 'x', since
 \scheme{\x} marks the start of a hex scalar value),
 whereas \scheme{|} is used
@@ -139,7 +139,7 @@ to escape the group of characters that follow it up through the
 matching \scheme{|}.
 For example, \scheme{\||\|} is an identifier with a two-character
 name consisting of the character \scheme{|} followed by the
-the character \scheme{\}, and \scheme{|hit me!|} is an identifier whose name
+character \scheme{\}, and \scheme{|hit me!|} is an identifier whose name
 contains a space.
 
 In addition, gensyms (page~\ref{desc:gensym}) are printed with

csug/io.stex

@@ -670,7 +670,7 @@ message.
 \endentryheader
 
 \noindent
-When When \var{obj} is \scheme{#f}, the port's beginning-of-line (BOL)
+When \var{obj} is \scheme{#f}, the port's beginning-of-line (BOL)
 flag is cleared; otherwise, the port's BOL flag is set.
 
 The BOL flag is consulted by \scheme{fresh-line}
@@ -2555,7 +2555,7 @@ objects \scheme{\var{obj} \dots}.
 Characters are copied from \var{format-string} to the output string from
 left to right, until \var{format-string} is exhausted.
 The format string may contain one or more \var{format directives}, which are
-multi-character sequences prefixed by a a tilde (~\scheme{~}~).
+multi-character sequences prefixed by a tilde (~\scheme{~}~).
 Each directive is replaced by some other text, often involving one or more
 of the \scheme{\var{obj} \dots} arguments, as determined by the semantics
 of the directive.

csug/objects.stex

@@ -1317,7 +1317,7 @@ be parsed as a number.
 
 \item
 A symbol whose name contains arbitrary characters may be written by
-escaping them them with \scheme{\} or with \scheme{|}.
+escaping them with \scheme{\} or with \scheme{|}.
 \scheme{\} is used to escape a single character (except 'x', since
 \scheme{\x} marks the start of a hex scalar value),
 whereas \scheme{|} is used

csug/system.stex

@@ -4362,7 +4362,7 @@ in bytes, including not only the bytes occupied for Scheme objects
 but also various forms of overhead, including fragmentation and
 reserved but not currently occupied memory, and is thus an accurate
 measure of the amount of heap memory currently reserved from the
-the operating system for the current process.
+operating system for the current process.
 
 %----------------------------------------------------------------------------
 \entryheader

csug/use.stex

@@ -1655,7 +1655,7 @@ The application installation script should install {\PetiteChezScheme}
 if not already installed on the target system.
 It should install the application boot file in the same directory as
 the {\PetiteChezScheme} boot file petite.boot is installed,
-and it should should install the application shared libraries, if any,
+and it should install the application shared libraries, if any,
 either in the same location or in a standard location for shared libraries
 on the target system.
 It should also create a link to or copy of the {\PetiteChezScheme}