Minor documentation fix.
Minor documentation fix.

Thanks to Satya Mallick.

Change-Id: I556f1c141bf16739d54450351b0f29fd4ea40014

whuaegeanse/ceres-solver,ysonggit/ceres-solver,entylop/ceres-solver,kartikkumar/ceres-solver,whuaegeanse/ceres-solver,kartikkumar/ceres-solver,DougFirErickson/ceres-solver,ikoruk/ceres-solver,timfel/ceres-bin,ikoruk/ceres-solver,DougFirErickson/ceres-solver,ikoruk/ceres-solver,ysonggit/ceres-solver,kartikkumar/ceres-solver,stonier/ceres_solver,entylop/ceres-solver,ysonggit/ceres-solver,ikoruk/ceres-solver,timfel/ceres-bin,whuaegeanse/ceres-solver,DougFirErickson/ceres-solver,timfel/ceres-bin,stonier/ceres_solver,kartikkumar/ceres-solver,entylop/ceres-solver,timfel/ceres-bin,ysonggit/ceres-solver,DougFirErickson/ceres-solver,entylop/ceres-solver,stonier/ceres_solver,whuaegeanse/ceres-solver,stonier/ceres_solver,ikoruk/ceres-solver