Remove some duplicate words

siunitx-complex.dtx

@@ -315,7 +315,7 @@
 % \begin{macro}{\@@_parse_clear:}
 %   Parsing for complex numbers needs some of the same approaches as the
 %   general parser. However, as the aim here is to do only enough to split
-%   the real and imaginary parts before handing off the the usual code,
+%   the real and imaginary parts before handing off the usual code,
 %   it's not a full repeat. Instead, we shortcut where we can. The |clear|
 %   function here is not only there to make this function shorter: it
 %   also allows a single way to zap any stored data if a parse error occurs.

siunitx-number.dtx

@@ -543,7 +543,7 @@
 %   \begin{syntax}
 %     |round-direction| = |down|\verb"|"|nearest|\verb"|"|up|
 %   \end{syntax}
-%   Choice which determines how values values are rounded. The setting
+%   Choice which determines how values are rounded. The setting
 %   |up| means that the value is always rounded away from zero, whereas the
 %   setting |down| means that the value will be rounded toward zero. The
 %   setting |nearest| means that the value will be rounded to the nearest

siunitx-print.dtx

@@ -113,7 +113,7 @@
 %     \cs{siunitx_print_number:n} \Arg{material}
 %     \cs{siunitx_print_unit:n} \Arg{material}
 %   \end{syntax}
-%   Prints the \meta{material} according the the prevailing settings for the
+%   Prints the \meta{material} according the prevailing settings for the
 %   submodule as applicable to the \meta{type} of content (|number| or |unit|).
 %   The \meta{material} should comprise normal
 %   \LaTeX{} mark-up for numbers or units. In particular, units will typically

siunitx-unit.dtx

@@ -1104,7 +1104,7 @@
 %   map over the list of names and active the unit definitions: these do
 %   different things depending on the switches set. There is then a decision to
 %   be made: is the unit input one that can be parsed (\enquote{symbolic}), or
-%   is is one containing one or more literals. In the latter case, there is a
+%   is one containing one or more literals. In the latter case, there is a
 %   still the need to convert the input into an expanded token list as some
 %   parts of the input could still be using unit macros.
 %

siunitx.tex

@@ -2125,7 +2125,7 @@ \subsection{Lists, products and ranges}
 choices \opt{individual}, \opt{combine-bracket} and \opt{combine}. The standard
 setting, \opt{individual}, leaves the exponent with the matching value. Both
 \opt{combine} and \opt{combine-bracket} take the exponent of the first entry
-and apply to to all other entries, with the exponent itself places at the end.
+and apply to all other entries, with the exponent itself places at the end.
 \begin{LaTeXdemo}
   \numlist{5e3;7e3;9e3;1e4} \\
   \numproduct{5e3 x 7e3 x 9e3 x 1e4} \\
@@ -2602,7 +2602,7 @@ \subsection{Using units}
 It is possible for the behavior of the \cs{per} function to depend on the
 prevailing math style. Setting either \opt{display-per-mode} or
 \opt{inline-per-mode} independently can be used to achieve this. For example,
-the following example will will use the \opt{symbol} setting for in line math,
+the following example will use the \opt{symbol} setting for in line math,
 and the \opt{fraction} setting when used in display math.
 \begin{LaTeXdemo}
   \sisetup{