1. the description of the command and the helper function are
clear hints that the command is intended to show a single JSON
measurement at a time (also the use case seems clear) [*]
2. the function used to read lines was failing for all my
measurements that take input. Since that was not the optimal
pattern anyway, use a better pattern to fix it.
3. some changes are automatically applied by my editor (VSCode
with the Go plugin) and I am fine with them.
4. while reading code, I also applied my preferred pattern
wrt whitespaces, i.e.: no whitespace inside functions, if a
function feels too long in this way, just break it.
Closes#57
[*] Even if we want to show many measurements at a time, which
does not seem needed, given the UI patterns, this functionality
won't be P0. What is P0 is to bless a new beta and give to
@sarathms binaries for all archs that support a basic `show`.
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