Add spelling exceptions and correct a typo

Author: cbm755

.codespell-ignorewords

@@ -7,4 +7,5 @@
 # without any warranty.
 
 # words that codespell should not complain about
-
+co-ordinates
+co-ordinate

Chapters/chapter2.tex

@@ -1224,7 +1224,7 @@ \subsection{MATLAB: assigning matrices and {\tt det} and {\tt cross}
 
 \subsection{MATLAB: generating scripts with the MATLAB editor}
 
-Often times using the command window in MATLAB to solve a problem can be tedious, because if the need arises to redo the problem, or change a parameter, one has to rewrite it all. The editor comes in handy for such cases. The editor is a text window (accesed from the command window: {\tt File $\rightarrow$ New $\rightarrow$ Blank M-file}) where one can write commands in the same syntax as the editor, and when one runs it, the results appear in the command window exactly as if one had written them there one after the other.
+Often times using the command window in MATLAB to solve a problem can be tedious, because if the need arises to redo the problem, or change a parameter, one has to rewrite it all. The editor comes in handy for such cases. The editor is a text window (accessed from the command window: {\tt File $\rightarrow$ New $\rightarrow$ Blank M-file}) where one can write commands in the same syntax as the editor, and when one runs it, the results appear in the command window exactly as if one had written them there one after the other.
 
 For example, the code to generate three random orthogonal vectors would look something like this:
 \begin{verbatim}