Fix units for mass flux plots

Author: xylar

mpas_analysis/ocean/climatology_map_fluxes.py

@@ -142,7 +142,7 @@ def __init__(self, config, mpasClimatologyTask, controlConfig=None,
                         unitsLabel = r'W m$^{-2}$'
                     else:
                         groupSubtitle = 'Mass fluxes'
-                        unitsLabel = r'kg m$^{-2}$ s^${-1}$'
+                        unitsLabel = r'kg m$^{-2}$ s$^{-1}$'
 
                     subtask.set_plot_info(
                         outFileLabel=outFileName,