Corrects comments in middle.sh script
Minor typo
Clarifies what we mean by a few extra key strokes
Edits on top of @BernhardKonrad's corrections
add cat to be consistent with previous lessons
Merge branch 'v5alpha' of https://github.com/gvwilson/bc into v5alpha
Specify key points
Slight edit to @BernhardKonrad's chnages
Improve at find lesson

1.  Making filenames in `find` example match filenames in diagram.
2.  Using `-print` with `find`.
Fixing formatting of pipe-and-filter challenges
Removing explicit 'level' keys from Markdown files
Switching to explicit <pre> blocks with styles instead of fences
Merge branch 'sticking-with-jekyll' of github.com:gvwilson/bc into sticking-with-jekyll
Make Challenge 2 in the novice shell lesson 5 consistent

This challenge used two different file names, neither of which was
consistent with part of the problem description. I chose the
longest.sh file name and made the challenge consistent for this
choice.
Converting shell lesson Markdown files to use div + fence block
Match number of samples and math in novice shell Introduction

The number of samples is originally reported as 1520, but when
discussing how many possible combinations there are it is treated
as 300 samples. 1520 leads to some fairly crazy numbers for the
amount of runs involved so reduce the number of samples to 300
to match the existing calculations.
Typo fix in Challenge 4 of Novice Shell 5
Remove discussion of ls -s and -h

This material doesn't seem to me to accomplish a lot with respect
to the objectives of the lesson and it adds a feeling of "the
shell is complicated" right up front by talking about how the
default output is confusing, showing a "human" flag that
presents things in bytes (which isn't *that* human friendly for
novices), and discussing how memory works.
Remove comparison of cp and mv from challenge in novice shell

Challenge 3 in /novice/shell/02 asks why mv and cp behave
differently in the case of providing multiple file names, but as
far as I can tell they behave exactly the same.
Add the use of ls -s -h as an exercise