Ultra light weight ini file parser

Consider a simple ini file config.ini like this:

[something]
foo = bar

[something else]
answer = 42
name = Boaty McBoatface

There are two sections (inbetween "[" and "]") defined, "something" and "something else". These sections contain a dictionary of strings each, the keys being some string followed by "=", and anything else until end of the line as values. The leading and trailing spaces in section headers, keys and values are trimmed.