lib/dot: rename `exemples` to `examples`

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>

diff --git a/lib/dot/exemples/clusters.nit b/lib/dot/examples/clusters.nit
similarity index 100%
rename from lib/dot/exemples/clusters.nit
rename to lib/dot/examples/clusters.nit

diff --git a/lib/dot/exemples/hello.nit b/lib/dot/examples/hello.nit
similarity index 100%
rename from lib/dot/exemples/hello.nit
rename to lib/dot/examples/hello.nit

diff --git a/lib/dot/exemples/undirected_clusters.nit b/lib/dot/examples/undirected_clusters.nit
similarity index 100%
rename from lib/dot/exemples/undirected_clusters.nit
rename to lib/dot/examples/undirected_clusters.nit