Spelling mistakes found checking en-GB to en-US

[albert-github]

Based an #8514 a check words that are misspelling in en-US but are correct in en-GB (CGAL normally uses en-US)

Recognized by my spelling checker and by google translate as misspelled

• analyse ==> analyze
• analysed ==> analyzed
• analysing ==> analyzing
• behaviour ==> behavior
• behaviours ==> behaviors
• centre ==> center
• centred ==> centered
• centres ==> centers
• characterising ==> characterizing
• colour ==> color
• colouring ==> coloring
• colours ==> colors
• customisation ==> customization
• equalise ==> equalize
• favour ==> favor
• favourable ==> favorable
• favoured ==> favored
• flavours ==> flavors
• fulfils ==> fulfills
• Generalised ==> Generalized
• initialisation ==> initialization
• initialise ==> initialize
• initialised ==> initialized
• initialises ==> initializes
• initialising ==> initializing
• licence ==> license
• localisation ==> localization
• localise ==> localize
• maximise ==> maximize
• maximises ==> maximizes
• millimetres ==> millimeters
• modelled ==> modeled
• mould ==> mold
• Neighbour ==> Neighbor
• neighbouring ==> neighboring
• neighbours ==> neighbors
• normalisation ==> normalization
• Normalise ==> Normalize
• optimisation ==> optimization
• optimisations ==> optimizations
• optimise ==> optimize
• optimiser ==> optimizer
• optimising ==> optimizing
• parameterised ==> parameterized
• practise ==> practice
• prioritised ==> prioritized
• realise ==> realize
• recognised ==> recognized
• Recognising ==> Recognizing
• Regularised ==> Regularized
• specialisation ==> specialization
• specialisations ==> specializations
• specialised ==> specialized
• standardise ==> standardize
• utilisation ==> utilization
• Visualisation ==> Visualization
• visualised ==> visualized

Recognized by my spelling checker but not by google translate as misspelled

• Acknowledgement ==> Acknowledgment
• analogue ==> analog
• cancelled ==> canceled
• Cancelling ==> Canceling
• grey ==> gray
• greyed ==> grayed
• modeller ==> modeler Remark a bit strange as modelled ==> modeled is recognized
• Modellers ==> Modelers
• modelling ==> modeling

Questions:

• Should all those misspellings be corrected (except when in the bib file and the original document also has the "misspelling").
• should we have 1 PR per package

or

• 1 PR per unique misspelled word(-type)

0r

• ...

[afabri]

Note that we do not want to change if the word is part of a function name, because that would be hassle for users. I was for example wondering about gray, but we do it good here.

[albert-github]

No variable, class, namespace, function names etc. I would leave out (and bib files have to be checked against the original title as defined by the author(s))

[afabri]

So if it is only documentation and comment, then I would say, make it just a single PR for the first category.
Concering mould it seems correct to me. See for example here. I guess the word is just too specific.

[afabri]

In fact no. Mould is British.

[albert-github]

I'll have a look.

I think the cancelled / modeller should also be done as e.g. the word canceled is used (e.g. Linear_cell_complex/demo/Linear_cell_complex/MainWindow.cpp) so this would be more consistent (similar for modeller e.g. Arrangement_on_surface_2/doc/Arrangement_on_surface_2/Arrangement_on_surface_2.txt) the other words I didn't check yet.