Bug Fix: Add g_ to name of g vector name in ps_point

[SteveBronder]

Just a quick bug fix introduced in #2828 to add std::string("g_") to the names of the ps_point method.

Submission Checklist

• Run unit tests: ./runTests.py src/test/unit
• Run cpplint: make cpplint
• Declare copyright holder and open-source license: see below

Summary

Intended Effect

How to Verify

Side Effects

Documentation

Copyright and Licensing

Please list the copyright holder for the work you are submitting (this will be you or your assignee, such as a university or company): Steve Bronder

By submitting this pull request, the copyright holder is agreeing to license the submitted work under the following licenses:

• Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)
• Documentation: CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

[stan-buildbot]

(stat_comp_benchmarks/benchmarks/gp_pois_regr/gp_pois_regr.stan, 1.01)
(stat_comp_benchmarks/benchmarks/low_dim_corr_gauss/low_dim_corr_gauss.stan, 1.0)
(stat_comp_benchmarks/benchmarks/irt_2pl/irt_2pl.stan, 1.0)
(stat_comp_benchmarks/benchmarks/pkpd/one_comp_mm_elim_abs.stan, 1.01)
(stat_comp_benchmarks/benchmarks/eight_schools/eight_schools.stan, 0.99)
(stat_comp_benchmarks/benchmarks/gp_regr/gp_regr.stan, 0.99)
(stat_comp_benchmarks/benchmarks/arK/arK.stan, 0.99)
(performance.compilation, 1.01)
(stat_comp_benchmarks/benchmarks/low_dim_gauss_mix_collapse/low_dim_gauss_mix_collapse.stan, 1.01)
(stat_comp_benchmarks/benchmarks/low_dim_gauss_mix/low_dim_gauss_mix.stan, 0.98)
(stat_comp_benchmarks/benchmarks/sir/sir.stan, 1.1)
(stat_comp_benchmarks/benchmarks/pkpd/sim_one_comp_mm_elim_abs.stan, 1.0)
(stat_comp_benchmarks/benchmarks/garch/garch.stan, 1.17)
(stat_comp_benchmarks/benchmarks/gp_regr/gen_gp_data.stan, 1.02)
(stat_comp_benchmarks/benchmarks/arma/arma.stan, 1.14)
Result: 1.02870960471
Commit hash: 3fd868f

[rok-cesnovar]

In order to prevent the fail on Travis, this PR needs a merge with fresh develop. Sorry for the inconvenience.

[betanalpha]

There's no bug here.

The PR title indicates that the gradient components names are wrong, but they're fine. The code instead prepends a "q_" to the parameter names, but the parameter names don't get a prefix. Only the corresponding gradient and momenta components need a prefix to differentiate them from the parameters.

[SteveBronder]

Ahhh, oh my b. Aight cool I'll close this