Fix typo

[coveralls]

Coverage remained the same at 78.276% when pulling 545c40e9d14977957a5817ca74181f3867dfe840 on bl/typo into 2f192832db2c34dfc1bf7da88c4bfb937dcff864 on master.

[blegat]

Travis failures are on nightly and v0.5 (which is a download failure it seems)

[joehuchette]

Thanks!