<p>Yup, showing whitespace was how I found the cause of the warning. Looked like tabs were used mostly throughout the source, so I replaced some space indentation with tabs.</p>
<p>I assume you'd rather not have the warning showing for gcc8 compilers?</p>
<p>I wonder if gcc8 shouldn't be added to the travis build matrix, such as is done here:<br>
<a href="https://github.com/theimpossibleastronaut/rmw/blob/master/.travis.yml">https://github.com/theimpossibleastronaut/rmw/blob/master/.travis.yml</a> cc <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=793526" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/b4n">@b4n</a></p>
<p>And if so, may also want that for the main geany repo.</p>

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