STYLE: Remove space between class and member names in C++ source files

[N-Dekker]

It appears that clang-format has in some cases introduced a space
character between ClassName and ::MemberName. This typically seems
to have happened when there originally was a line break between the
class name and the member name.

This commit fixes the formatting by removing those spaces, as follows:

find . \( -iname *.cxx -and ! -path *ThirdParty* \) -exec perl -pi -w -e 's/([A-Z][a-z]+) \:\:([A-Z][a-z])/$1::$2/g;' {} \;
find . \( -iname *.hxx -and ! -path *ThirdParty* \) -exec perl -pi -w -e 's/([A-Z][a-z]+) \:\:([A-Z][a-z])/$1::$2/g;' {} \;
find . \( -iname *.h -and ! -path *ThirdParty* \) -exec perl -pi -w -e 's/([A-Z][a-z]+) \:\:([A-Z][a-z])/$1::$2/g;' {} \;

[N-Dekker]

@hjmjohnson Do you also like this commit? I realize, you wrote that regarding code formatting, "automation is key", while this commit is only semi-automatic!

If you don't like this commit, it would be OK to me to close the PR without merge. No problem. Because it's really a very minor cosmetic thing to me. But if you do like it, I think I should adjust the *.hxx files as well.

[hjmjohnson]

@N-Dekker I love this commit !!

Please remove "WIP: and it can be merged".

[N-Dekker]

I love this commit !!

@hjmjohnson Thanks, I'm glad to hear so :-) You know it's partially a matter of taste, so I can image that some people actually like to have a space before the ::MemberName. But still it looks like a Clang-Format bug anyway.

For the sake of completeness, I think I should also do the *.hxx file, before the PR is ready!