Merge pull request #1216 from Mat-Ge/patch-typo

Some typos

doc/en/CAS/Numbers.md

@@ -22,7 +22,7 @@ Optionally, depending on the question settings, you have
     i: %i
     j: %i
 
-Sometimes you need to use \(e\), or other constants, as an abstract symbol not a number.  The Maxima solution is to use the `kill()` command, but for security reasons users of STACK are not permitted to use this function. Instead use `stack_reset_vars(true)` in the question variables.  This resets all the special constants defined by STACK so the symbols can be redefined in an individual STACK question.  (On Maxima 5.42.1 (and possibly others) `stack_reset_vars(true)` also resets `ordergreat`, so if you need to use `stack_reset_vars(true)` it must be the first command the question variables.  Since this has been fixed in Maxima 5.44.0, it was probably a bug in Maxima.)
+Sometimes you need to use \(e\), or other constants, as an abstract symbol not a number.  The Maxima solution is to use the `kill()` command, but for security reasons users of STACK are not permitted to use this function. Instead use `stack_reset_vars(true)` in the question variables.  This resets all the special constants defined by STACK so the symbols can be redefined in an individual STACK question.  (On Maxima 5.42.1 (and possibly others) `stack_reset_vars(true)` also resets `ordergreat`, so if you need to use `stack_reset_vars(true)` it must be the first command in the question variables.  Since this has been fixed in Maxima 5.44.0, it was probably a bug in Maxima.)
 
 If you want to change the display of the constant \(e\) you need to refer to the `%e%` value, e.g. `texput(%e, "\mathrm{e}");`.
 

doc/en/CAS/Simplification.md

@@ -269,7 +269,7 @@ The first of these does not pull out a numerical denominator.  The second does.
 
 ### Trig simplification ###
 
-Maxima does have the ability to make assumptions, e.g. to assume that \(n\) is an integer and then simplify \(3\cos(n\pi/2)^2\) to \( \frac{3}{2}(1+(-1)^n)\).  Assume the student's answer is `ans1` then then define the following feedback variables:
+Maxima does have the ability to make assumptions, e.g. to assume that \(n\) is an integer and then simplify \(3\cos(n\pi/2)^2\) to \( \frac{3}{2}(1+(-1)^n)\).  Assume the student's answer is `ans1` then define the following feedback variables:
 
     declare(n,integer);
     sans1:ev(trigrat(ans1),simp);

doc/en/Developer/Security_map.md

@@ -10,8 +10,8 @@ for somewhat obvious reasons!  Hence, we need to restrict the availability of ce
 2. Teacher.  Teacher's answers cannot contain these, but they are not a security risk.  Usually these have side effects within the Maxima code, e.g. setting a global variable which might cause problems later/elsewhere.
 3. Student.  Student's expressions can only contain these.
 
-Since STACK 4.3 the Maxima statement parser infrastruture uses a JSON file
-describing all identifiers of functions,  variables, constants, and operators
+Since STACK 4.3 the Maxima statement parser infrastructure uses a JSON file
+describing all identifiers of functions,  variables, constants and operators
 and features we attach to them. The catalogue is stored in
 
     stack/cas/security-map.json