support/filetools.cpp: why the double colon in the warning message when binary invocation fails?

[Thibaut Cuvelier]

Dear list,

When running LyX on Windows, it first tries to use py -3 and py -2 to
determine the version of the available version of Python. However, on my
machine, none of these is available, so that I get warning messages:

D:\LyX\lyx-unstable\cmake-build-debug\bin\LyX.exe
RunCommand:: could not terminate child process: Invalid argument
RunCommand:: could not terminate child process: Invalid argument
support\Systemcall.cpp (268): Systemcall: 'git ls-files
"MissingEndLayoutBetweenTables.lyx"' did not start!
support\Systemcall.cpp (269): error The process failed to start. Either the
invoked program is missing, or you may have

It's just a minor thing, but why are there two colons in these messages?
RunCommand:*:*
I just propose to remove one of those colons, to have a nicer output,
unless there was a reason (this line dates back from SVN and .C extension
for C++ files, so that's a while ago).

What do you think?
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