initial blanks in some gravity fields headers prevent loading them

Some gravity fields have extra blanks at the front of headers lines in ICGEM format. One example is IGGT_R1C model available from ICGEM catalog http://icgem.gfz-potsdam.de/tom_longtime. The header of this file reads:

begin_of_head ======================================================================================
 modelname              IGGT_R1C
 product_type           gravity_field
 earth_gravity_constant 0.3986004415E+15
 radius                 0.6378136460E+07
 max_degree             240
 norm                   fully_normalized
 tide_system            tide_free
 errors                 formal

key    L    M             C                   S                  sigma C              sigma S
end_of_head ========================================================================================

The single blank before the expected keywords modelname, product_type... Prevents proper parsing. The resulting error is serious as since the max degree has not been parsed, the arrays holding the coefficients have not been built and a NullPointerException is raised.