typo accross to across in input-data.rst (#871)

docs/input-data.rst

@@ -60,7 +60,7 @@ All other data: auto-downloads and the ``~/.oggm_config`` file
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Unlike runtime parameters (such as physical constants or working directories),
-the input data is shared accross runs and even accross computers if you want
+the input data is shared across runs and even across computers if you want
 to. Therefore, the paths to previously downloaded data are stored in a
 configuration file that you'll find in your ``$HOME`` folder:
 the ``~/.oggm_config`` file.
@@ -492,4 +492,4 @@ have access to the timeseries through the glacier directory:
 
 .. _WGMS: https://wgms.ch
 .. _Fluctuations of Glaciers (FoG): https://wgms.ch/data_databaseversions/
-.. _GMD Paper: https://www.geosci-model-dev.net/12/909/2019/
+.. _GMD Paper: https://www.geosci-model-dev.net/12/909/2019/