Various clang-format-guided cleanups.

Some variable and function names have been shortened, either because
they were too long, or because they were too long.  They were too
damned long, guys.

r? @LordAro 
I've pushed a commit to remove ostringstream.  In a desparate attempt to avoid std::string() line noise, I've factored out some of the strings into constants, which I'm sure you'll absolutely love and accept right away :stuck_out_tongue: