If a line doesn't contain an = separator, it is skipped, rather than
raising an error.
This is potentially useful, so let's document this behaviour.
<listitem><para>Similar to <varname>Environment=</varname> but
reads the environment variables from a text file. The text
file should contain new-line-separated variable assignments.
- Empty lines and lines starting with ; or # will be ignored,
+ Empty lines, lines without an <literal>=</literal> separator,
+ or lines starting with ; or # will be ignored,
which may be used for commenting. A line ending with a
backslash will be concatenated with the following one,
allowing multiline variable definitions. The parser strips